Linux stopped reading my 2nd HDD - Help!! - Setup

This is a discussion on Linux stopped reading my 2nd HDD - Help!! - Setup ; I have been running Win2k/FC8 on my first HDD (80Gb) and only FC5 on my 2nd HDD (160Gb). MBR and Grub is on 1sr HD (sda). Things were going smoothly until today, when I tried to boot my FC5 I ...

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Thread: Linux stopped reading my 2nd HDD - Help!!

  1. Linux stopped reading my 2nd HDD - Help!!

    I have been running Win2k/FC8 on my first HDD (80Gb) and only FC5 on
    my 2nd HDD (160Gb). MBR and Grub is on 1sr HD (sda). Things were going
    smoothly until today, when I tried to boot my FC5 I got the error
    "Filesystem unknown and Partition type 0x93". Grub could not load FC5.
    My FC8 and Win2k are still working fine.

    Using fdisk I could change the partition type to 0x83 on the 2nd HDD
    (sdb) for the first 3 partitions but could not change the extended
    partition, which still says unknown. See below

    grub> geometry (hd1)
    drive 0x81: C/H/S = 19457/255/63, The number of sectors = 312581808, /
    dev/sdb
    Partition num: 0, Filesystem type unknown, partition type 0x83
    Partition num: 1, Filesystem type unknown, partition type 0x83
    Partition num: 2, Filesystem type unknown, partition type 0x83
    Partition num: 3, Filesystem type unknown, partition type 0x15

    Tried using the install CD to see if I can fix or upgrade my 2nd HD
    but I got the message that partitions are not readable and the I need
    to initialize the HD causing data loss.
    I have all my important data on my 2nd HDD. Can some one pl. help me
    on how I can resurrect the FC5 and or at least recover the data. I
    have to scream HELP! HELP!

    Thanks for your help
    NS

  2. Re: Linux stopped reading my 2nd HDD - Help!!

    sridhar wrote:
    > I have been running Win2k/FC8 on my first HDD (80Gb) and only FC5 on
    > my 2nd HDD (160Gb). MBR and Grub is on 1sr HD (sda). Things were going
    > smoothly until today, when I tried to boot my FC5 I got the error
    > "Filesystem unknown and Partition type 0x93". Grub could not load FC5.
    > My FC8 and Win2k are still working fine.
    >
    > Using fdisk I could change the partition type to 0x83 on the 2nd HDD
    > (sdb) for the first 3 partitions but could not change the extended
    > partition, which still says unknown. See below
    >
    > grub> geometry (hd1)
    > drive 0x81: C/H/S = 19457/255/63, The number of sectors = 312581808, /
    > dev/sdb
    > Partition num: 0, Filesystem type unknown, partition type 0x83
    > Partition num: 1, Filesystem type unknown, partition type 0x83
    > Partition num: 2, Filesystem type unknown, partition type 0x83
    > Partition num: 3, Filesystem type unknown, partition type 0x15
    >
    > Tried using the install CD to see if I can fix or upgrade my 2nd HD
    > but I got the message that partitions are not readable and the I need
    > to initialize the HD causing data loss.
    > I have all my important data on my 2nd HDD. Can some one pl. help me
    > on how I can resurrect the FC5 and or at least recover the data. I
    > have to scream HELP! HELP!
    >
    > Thanks for your help
    > NS


    Here is the partition table for the first hard drive of a dual-boot system
    of mine according to fdisk. Note that the partition type for the fourth
    (extended) partition is f which, I believe, is 15 in hex. If this is
    representative, your fourth partition is OK and you are having other problems.

    Disk /dev/hda: 81.9 GB, 81964302336 bytes
    255 heads, 63 sectors/track, 9964 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes

    Device Boot Start End Blocks Id System
    /dev/hda1 * 1 3134 25173823+ 7 HPFS/NTFS
    /dev/hda2 3135 3657 4200997+ c W95 FAT32 (LBA)
    /dev/hda3 3658 3670 104422+ 83 Linux
    /dev/hda4 3671 9964 50556555 f W95 Ext'd (LBA) <--
    /dev/hda5 3671 4193 4200966 83 Linux
    /dev/hda6 4194 4324 1052226 82 Linux swap
    /dev/hda7 4325 4847 4200966 83 Linux
    /dev/hda8 4848 5370 4200966 83 Linux
    /dev/hda9 5371 5893 4200966 83 Linux
    /dev/hda10 5894 6938 8393931 83 Linux

    According to the fdisk command, the following are the partition types:

    0 Empty 1e Hidden W95 FAT1 75 PC/IX be Solaris boot
    1 FAT12 24 NEC DOS 80 Old Minix bf Solaris
    2 XENIX root 39 Plan 9 81 Minix / old Lin c1 DRDOS/sec (FAT-
    3 XENIX usr 3c PartitionMagic 82 Linux swap c4 DRDOS/sec (FAT-
    4 FAT16 <32M 40 Venix 80286 83 Linux c6 DRDOS/sec (FAT-
    5 Extended 41 PPC PReP Boot 84 OS/2 hidden C: c7 Syrinx
    6 FAT16 42 SFS 85 Linux extended da Non-FS data
    7 HPFS/NTFS 4d QNX4.x 86 NTFS volume set db CP/M / CTOS / .
    8 AIX 4e QNX4.x 2nd part 87 NTFS volume set de Dell Utility
    9 AIX bootable 4f QNX4.x 3rd part 8e Linux LVM df BootIt
    a OS/2 Boot Manag 50 OnTrack DM 93 Amoeba e1 DOS access
    b W95 FAT32 51 OnTrack DM6 Aux 94 Amoeba BBT e3 DOS R/O
    c W95 FAT32 (LBA) 52 CP/M 9f BSD/OS e4 SpeedStor
    e W95 FAT16 (LBA) 53 OnTrack DM6 Aux a0 IBM Thinkpad hi eb BeOS fs
    f W95 Ext'd (LBA) 54 OnTrackDM6 a5 FreeBSD ee EFI GPT
    10 OPUS 55 EZ-Drive a6 OpenBSD ef EFI (FAT-12/16/
    11 Hidden FAT12 56 Golden Bow a7 NeXTSTEP f0 Linux/PA-RISC b
    12 Compaq diagnost 5c Priam Edisk a8 Darwin UFS f1 SpeedStor
    14 Hidden FAT16 <3 61 SpeedStor a9 NetBSD f4 SpeedStor
    16 Hidden FAT16 63 GNU HURD or Sys ab Darwin boot f2 DOS secondary
    17 Hidden HPFS/NTF 64 Novell Netware b7 BSDI fs fd Linux raid auto
    18 AST SmartSleep 65 Novell Netware b8 BSDI swap fe LANstep
    1b Hidden W95 FAT3 70 DiskSecure Mult bb Boot Wizard hid ff BBT
    1c Hidden W95 FAT3

    My grub.conf file on that machine says:

    # grub.conf generated by anaconda
    #
    # Note that you do not have to rerun grub after making changes to this file
    # NOTICE: You have a /boot partition. This means that
    # all kernel and initrd paths are relative to /boot/, eg.
    # root (hd0,2)
    # kernel /vmlinuz-version ro root=/dev/hda5
    # initrd /initrd-version.img
    #boot=/dev/hda
    default=0
    timeout=15
    splashimage=(hd0,2)/grub/splash.xpm.gz
    hiddenmenu
    title CentOS (2.6.9-67.0.7.ELsmp)
    root (hd0,2)
    kernel /vmlinuz-2.6.9-67.0.7.ELsmp ro root=LABEL=/1 rhgb quiet
    initrd /initrd-2.6.9-67.0.7.ELsmp.img
    title CentOS (2.6.9-67.0.4.ELsmp)
    root (hd0,2)
    kernel /vmlinuz-2.6.9-67.0.4.ELsmp ro root=LABEL=/1 rhgb quiet
    initrd /initrd-2.6.9-67.0.4.ELsmp.img
    title W-XP
    rootnoverify (hd0,0)
    chainloader +1

    My grub says this about my first hard drive:

    grub> geometry (hd0)
    drive 0x80: C/H/S = 9964/255/63, The number of sectors = 160086528, /dev/hda
    Partition num: 0, Filesystem type unknown, partition type 0x7
    Partition num: 1, Filesystem type is fat, partition type 0xc
    Partition num: 2, Filesystem type is ext2fs, partition type 0x83
    Partition num: 4, Filesystem type is ext2fs, partition type 0x83
    Partition num: 5, Filesystem type unknown, partition type 0x82
    Partition num: 6, Filesystem type is ext2fs, partition type 0x83
    Partition num: 7, Filesystem type is ext2fs, partition type 0x83
    Partition num: 8, Filesystem type is ext2fs, partition type 0x83
    Partition num: 9, Filesystem type is ext2fs, partition type 0x83

    Note that it does not even list the extended partition., and that the first
    partition is listed as unknown (Windows NTFS partition).

    --
    .~. Jean-David Beyer Registered Linux User 85642.
    /V\ PGP-Key: 9A2FC99A Registered Machine 241939.
    /( )\ Shrewsbury, New Jersey http://counter.li.org
    ^^-^^ 06:55:01 up 2 days, 23:27, 3 users, load average: 4.19, 4.17, 4.12

  3. Re: Linux stopped reading my 2nd HDD - Help!!

    On May 10, 4:17 pm, Jean-David Beyer wrote:
    > sridhar wrote:
    > > I have been running Win2k/FC8 on my first HDD (80Gb) and only FC5 on
    > > my 2nd HDD (160Gb). MBR and Grub is on 1sr HD (sda). Things were going
    > > smoothly until today, when I tried to boot my FC5 I got the error
    > > "Filesystem unknown and Partition type 0x93". Grub could not load FC5.
    > > My FC8 and Win2k are still working fine.

    >
    > > Using fdisk I could change the partition type to 0x83 on the 2nd HDD
    > > (sdb) for the first 3 partitions but could not change the extended
    > > partition, which still says unknown. See below

    >
    > > grub> geometry (hd1)
    > > drive 0x81: C/H/S = 19457/255/63, The number of sectors = 312581808, /
    > > dev/sdb
    > > Partition num: 0, Filesystem type unknown, partition type 0x83
    > > Partition num: 1, Filesystem type unknown, partition type 0x83
    > > Partition num: 2, Filesystem type unknown, partition type 0x83
    > > Partition num: 3, Filesystem type unknown, partition type 0x15

    >
    > > Tried using the install CD to see if I can fix or upgrade my 2nd HD
    > > but I got the message that partitions are not readable and the I need
    > > to initialize the HD causing data loss.
    > > I have all my important data on my 2nd HDD. Can some one pl. help me
    > > on how I can resurrect the FC5 and or at least recover the data. I
    > > have to scream HELP! HELP!

    >
    > > Thanks for your help
    > > NS

    >
    > Here is the partition table for the first hard drive of a dual-boot system
    > of mine according to fdisk. Note that the partition type for the fourth
    > (extended) partition is f which, I believe, is 15 in hex. If this is
    > representative, your fourth partition is OK and you are having other problems.
    >
    > Disk /dev/hda: 81.9 GB, 81964302336 bytes
    > 255 heads, 63 sectors/track, 9964 cylinders
    > Units = cylinders of 16065 * 512 = 8225280 bytes
    >
    > Device Boot Start End Blocks Id System
    > /dev/hda1 * 1 3134 25173823+ 7 HPFS/NTFS
    > /dev/hda2 3135 3657 4200997+ c W95 FAT32 (LBA)
    > /dev/hda3 3658 3670 104422+ 83 Linux
    > /dev/hda4 3671 9964 50556555 f W95 Ext'd (LBA) <--
    > /dev/hda5 3671 4193 4200966 83 Linux
    > /dev/hda6 4194 4324 1052226 82 Linux swap
    > /dev/hda7 4325 4847 4200966 83 Linux
    > /dev/hda8 4848 5370 4200966 83 Linux
    > /dev/hda9 5371 5893 4200966 83 Linux
    > /dev/hda10 5894 6938 8393931 83 Linux
    >
    > According to the fdisk command, the following are the partition types:
    >
    > 0 Empty 1e Hidden W95 FAT1 75 PC/IX be Solaris boot
    > 1 FAT12 24 NEC DOS 80 Old Minix bf Solaris
    > 2 XENIX root 39 Plan 9 81 Minix / old Lin c1 DRDOS/sec (FAT-
    > 3 XENIX usr 3c PartitionMagic 82 Linux swap c4 DRDOS/sec (FAT-
    > 4 FAT16 <32M 40 Venix 80286 83 Linux c6 DRDOS/sec (FAT-
    > 5 Extended 41 PPC PReP Boot 84 OS/2 hidden C: c7 Syrinx
    > 6 FAT16 42 SFS 85 Linux extended da Non-FS data
    > 7 HPFS/NTFS 4d QNX4.x 86 NTFS volume set db CP/M / CTOS / .
    > 8 AIX 4e QNX4.x 2nd part 87 NTFS volume set de Dell Utility
    > 9 AIX bootable 4f QNX4.x 3rd part 8e Linux LVM df BootIt
    > a OS/2 Boot Manag 50 OnTrack DM 93 Amoeba e1 DOS access
    > b W95 FAT32 51 OnTrack DM6 Aux 94 Amoeba BBT e3 DOS R/O
    > c W95 FAT32 (LBA) 52 CP/M 9f BSD/OS e4 SpeedStor
    > e W95 FAT16 (LBA) 53 OnTrack DM6 Aux a0 IBM Thinkpad hi eb BeOS fs
    > f W95 Ext'd (LBA) 54 OnTrackDM6 a5 FreeBSD ee EFI GPT
    > 10 OPUS 55 EZ-Drive a6 OpenBSD ef EFI (FAT-12/16/
    > 11 Hidden FAT12 56 Golden Bow a7 NeXTSTEP f0 Linux/PA-RISC b
    > 12 Compaq diagnost 5c Priam Edisk a8 Darwin UFS f1 SpeedStor
    > 14 Hidden FAT16 <3 61 SpeedStor a9 NetBSD f4 SpeedStor
    > 16 Hidden FAT16 63 GNU HURD or Sys ab Darwin boot f2 DOS secondary
    > 17 Hidden HPFS/NTF 64 Novell Netware b7 BSDI fs fd Linux raid auto
    > 18 AST SmartSleep 65 Novell Netware b8 BSDI swap fe LANstep
    > 1b Hidden W95 FAT3 70 DiskSecure Mult bb Boot Wizard hid ff BBT
    > 1c Hidden W95 FAT3
    >
    > My grub.conf file on that machine says:
    >
    > # grub.conf generated by anaconda
    > #
    > # Note that you do not have to rerun grub after making changes to this file
    > # NOTICE: You have a /boot partition. This means that
    > # all kernel and initrd paths are relative to /boot/, eg.
    > # root (hd0,2)
    > # kernel /vmlinuz-version ro root=/dev/hda5
    > # initrd /initrd-version.img
    > #boot=/dev/hda
    > default=0
    > timeout=15
    > splashimage=(hd0,2)/grub/splash.xpm.gz
    > hiddenmenu
    > title CentOS (2.6.9-67.0.7.ELsmp)
    > root (hd0,2)
    > kernel /vmlinuz-2.6.9-67.0.7.ELsmp ro root=LABEL=/1 rhgb quiet
    > initrd /initrd-2.6.9-67.0.7.ELsmp.img
    > title CentOS (2.6.9-67.0.4.ELsmp)
    > root (hd0,2)
    > kernel /vmlinuz-2.6.9-67.0.4.ELsmp ro root=LABEL=/1 rhgb quiet
    > initrd /initrd-2.6.9-67.0.4.ELsmp.img
    > title W-XP
    > rootnoverify (hd0,0)
    > chainloader +1
    >
    > My grub says this about my first hard drive:
    >
    > grub> geometry (hd0)
    > drive 0x80: C/H/S = 9964/255/63, The number of sectors = 160086528, /dev/hda
    > Partition num: 0, Filesystem type unknown, partition type 0x7
    > Partition num: 1, Filesystem type is fat, partition type 0xc
    > Partition num: 2, Filesystem type is ext2fs, partition type 0x83
    > Partition num: 4, Filesystem type is ext2fs, partition type 0x83
    > Partition num: 5, Filesystem type unknown, partition type 0x82
    > Partition num: 6, Filesystem type is ext2fs, partition type 0x83
    > Partition num: 7, Filesystem type is ext2fs, partition type 0x83
    > Partition num: 8, Filesystem type is ext2fs, partition type 0x83
    > Partition num: 9, Filesystem type is ext2fs, partition type 0x83
    >
    > Note that it does not even list the extended partition., and that the first
    > partition is listed as unknown (Windows NTFS partition).
    >
    > --
    > .~. Jean-David Beyer Registered Linux User 85642.
    > /V\ PGP-Key: 9A2FC99A Registered Machine 241939.
    > /( )\ Shrewsbury, New Jersey http://counter.li.org
    > ^^-^^ 06:55:01 up 2 days, 23:27, 3 users, load average: 4.19, 4.17, 4.12


    Well, fdisk shows the extended partition as 05 in hda (which was
    formatted using fc8) and as 15 in hdb (from fc5). But fdisk or grub
    does not even show the partitions under Extended partition hdb4. When
    I do a verify under fdisk, it gives a warning that there is overlap
    between partitions. I am at loss as to how to recover my valuable
    data.

    NS

  4. Re: Linux stopped reading my 2nd HDD - Help!!

    On Sat, 10 May 2008 11:17:46 +0000, Jean-David Beyer wrote:
    >
    > Here is the partition table for the first hard drive of a dual-boot
    > system of mine according to fdisk. Note that the partition type for the
    > fourth (extended) partition is f which, I believe, is 15 in hex. If this
    > is representative, your fourth partition is OK and you are having other
    > problems.
    >
    > Disk /dev/hda: 81.9 GB, 81964302336 bytes 255 heads, 63 sectors/track,
    > 9964 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
    >
    > Device Boot Start End Blocks Id System
    > /dev/hda1 * 1 3134 25173823+ 7 HPFS/NTFS
    > /dev/hda2 3135 3657 4200997+ c W95 FAT32 (LBA)
    > /dev/hda3 3658 3670 104422+ 83 Linux /dev/hda4
    > 3671 9964 50556555 f W95 Ext'd (LBA) <--
    > /dev/hda5 3671 4193 4200966 83 Linux /dev/hda6
    > 4194 4324 1052226 82 Linux swap /dev/hda7
    > 4325 4847 4200966 83 Linux /dev/hda8 4848
    > 5370 4200966 83 Linux /dev/hda9 5371 5893
    > 4200966 83 Linux /dev/hda10 5894 6938 8393931
    > 83 Linux
    >


    Are you sure it shouldn't be

    Disk /dev/sda: 400.0 GB, 400088457216 bytes
    255 heads, 63 sectors/track, 48641 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes
    Disk identifier: 0x2ca02c9f

    Device Boot Start End Blocks Id System
    /dev/sda1 * 1 6527 52428096 7 HPFS/NTFS
    /dev/sda2 6528 6658 1052257+ 83 Linux
    /dev/sda3 6659 6789 1052257+ 82 Linux swap /
    Solaris
    /dev/sda4 6790 48641 336176190 5 Extended <----
    /dev/sda5 6790 9400 20972826 83 Linux
    /dev/sda6 9401 10646 10008463+ 83 Linux
    /dev/sda7 10647 16872 50010313+ 7 HPFS/NTFS
    /dev/sda8 16873 23098 50010313+ 83 Linux
    /dev/sda9 23099 25589 20008926 83 Linux
    /dev/sda10 25590 28080 20008926 83 Linux
    /dev/sda11 28081 48641 165156201 83 Linux


    --
    Tayo'y Mga Pinoy

  5. Re: Linux stopped reading my 2nd HDD - Help!!

    On May 10, 5:19 pm, Baho Utot wrote:
    > On Sat, 10 May 2008 11:17:46 +0000, Jean-David Beyer wrote:
    >
    > > Here is the partition table for the first hard drive of a dual-boot
    > > system of mine according to fdisk. Note that the partition type for the
    > > fourth (extended) partition is f which, I believe, is 15 in hex. If this
    > > is representative, your fourth partition is OK and you are having other
    > > problems.

    >
    > > Disk /dev/hda: 81.9 GB, 81964302336 bytes 255 heads, 63 sectors/track,
    > > 9964 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes

    >
    > > Device Boot Start End Blocks Id System
    > > /dev/hda1 * 1 3134 25173823+ 7 HPFS/NTFS
    > > /dev/hda2 3135 3657 4200997+ c W95 FAT32 (LBA)
    > > /dev/hda3 3658 3670 104422+ 83 Linux /dev/hda4
    > > 3671 9964 50556555 f W95 Ext'd (LBA) <--
    > > /dev/hda5 3671 4193 4200966 83 Linux /dev/hda6
    > > 4194 4324 1052226 82 Linux swap /dev/hda7
    > > 4325 4847 4200966 83 Linux /dev/hda8 4848
    > > 5370 4200966 83 Linux /dev/hda9 5371 5893
    > > 4200966 83 Linux /dev/hda10 5894 6938 8393931
    > > 83 Linux

    >
    > Are you sure it shouldn't be
    >
    > Disk /dev/sda: 400.0 GB, 400088457216 bytes
    > 255 heads, 63 sectors/track, 48641 cylinders
    > Units = cylinders of 16065 * 512 = 8225280 bytes
    > Disk identifier: 0x2ca02c9f
    >
    > Device Boot Start End Blocks Id System
    > /dev/sda1 * 1 6527 52428096 7 HPFS/NTFS
    > /dev/sda2 6528 6658 1052257+ 83 Linux
    > /dev/sda3 6659 6789 1052257+ 82 Linux swap /
    > Solaris
    > /dev/sda4 6790 48641 336176190 5 Extended <----
    > /dev/sda5 6790 9400 20972826 83 Linux
    > /dev/sda6 9401 10646 10008463+ 83 Linux
    > /dev/sda7 10647 16872 50010313+ 7 HPFS/NTFS
    > /dev/sda8 16873 23098 50010313+ 83 Linux
    > /dev/sda9 23099 25589 20008926 83 Linux
    > /dev/sda10 25590 28080 20008926 83 Linux
    > /dev/sda11 28081 48641 165156201 83 Linux
    >
    > --
    > Tayo'y Mga Pinoy


    Yes this is how my hda is shown as. Extended as #5 and also lists all
    the partition within. But hdb shows only 4 partitions and the extended
    as 15.

    NS

  6. Re: Linux stopped reading my 2nd HDD - Help!!

    On Sat, 10 May 2008 03:05:17 -0700, sridhar wrote:

    > I have been running Win2k/FC8 on my first HDD (80Gb) and only FC5 on my
    > 2nd HDD (160Gb). MBR and Grub is on 1sr HD (sda). Things were going
    > smoothly until today, when I tried to boot my FC5 I got the error
    > "Filesystem unknown and Partition type 0x93". Grub could not load FC5.
    > My FC8 and Win2k are still working fine.
    >
    > Using fdisk I could change the partition type to 0x83 on the 2nd HDD
    > (sdb) for the first 3 partitions but could not change the extended
    > partition, which still says unknown. See below
    >
    > grub> geometry (hd1)
    > drive 0x81: C/H/S = 19457/255/63, The number of sectors = 312581808, /
    > dev/sdb
    > Partition num: 0, Filesystem type unknown, partition type 0x83
    > Partition num: 1, Filesystem type unknown, partition type 0x83
    > Partition num: 2, Filesystem type unknown, partition type 0x83
    > Partition num: 3, Filesystem type unknown, partition type 0x15
    >
    > Tried using the install CD to see if I can fix or upgrade my 2nd HD but
    > I got the message that partitions are not readable and the I need to
    > initialize the HD causing data loss. I have all my important data on my
    > 2nd HDD. Can some one pl. help me on how I can resurrect the FC5 and or
    > at least recover the data. I have to scream HELP! HELP!
    >
    > Thanks for your help


    I'd guess, that your 2nd drive's partition table has been corrupted. It
    would help if you'd post the output, as root, from fdisk -l for both hard
    drives to list the current partition tables, even if the 2nd drive's
    isn't complete. Also, post FC8's fstab off the first hard drive. Also,
    with FC8 running, what does 'df -h' show? How about 'cat /proc/
    partitions'? If you can get the start and end sectors of each partition,
    you can use fdisk to recreate the partition table. Deleting a partition
    doesn't destroy the data on the drive.

    If you had the space, I'd use dd to copy the entire 2nd drive as a single
    file, then try to fix the copy, so you can copy your data off it.

    Stef

  7. Re: Linux stopped reading my 2nd HDD - Help!!

    On May 12, 9:19 am, Stefan Patric wrote:
    > On Sat, 10 May 2008 03:05:17 -0700, sridhar wrote:
    > > I have been running Win2k/FC8 on my first HDD (80Gb) and only FC5 on my
    > > 2nd HDD (160Gb). MBR and Grub is on 1sr HD (sda). Things were going
    > > smoothly until today, when I tried to boot my FC5 I got the error
    > > "Filesystem unknown and Partition type 0x93". Grub could not load FC5.
    > > My FC8 and Win2k are still working fine.

    >
    > > Using fdisk I could change the partition type to 0x83 on the 2nd HDD
    > > (sdb) for the first 3 partitions but could not change the extended
    > > partition, which still says unknown. See below

    >
    > > grub> geometry (hd1)
    > > drive 0x81: C/H/S = 19457/255/63, The number of sectors = 312581808, /
    > > dev/sdb
    > > Partition num: 0, Filesystem type unknown, partition type 0x83
    > > Partition num: 1, Filesystem type unknown, partition type 0x83
    > > Partition num: 2, Filesystem type unknown, partition type 0x83
    > > Partition num: 3, Filesystem type unknown, partition type 0x15

    >
    > > Tried using the install CD to see if I can fix or upgrade my 2nd HD but
    > > I got the message that partitions are not readable and the I need to
    > > initialize the HD causing data loss. I have all my important data on my
    > > 2nd HDD. Can some one pl. help me on how I can resurrect the FC5 and or
    > > at least recover the data. I have to scream HELP! HELP!

    >
    > > Thanks for your help

    >
    > I'd guess, that your 2nd drive's partition table has been corrupted. It
    > would help if you'd post the output, as root, from fdisk -l for both hard
    > drives to list the current partition tables, even if the 2nd drive's
    > isn't complete. Also, post FC8's fstab off the first hard drive. Also,
    > with FC8 running, what does 'df -h' show? How about 'cat /proc/
    > partitions'? If you can get the start and end sectors of each partition,
    > you can use fdisk to recreate the partition table. Deleting a partition
    > doesn't destroy the data on the drive.
    >
    > If you had the space, I'd use dd to copy the entire 2nd drive as a single
    > file, then try to fix the copy, so you can copy your data off it.
    >
    > Stef


    Just an update.

    I was able to resolve the corrupt partition issue by using testdisk.
    It is an unbelievable utility at "http://www.cgsecurity.org/wiki/
    TestDisk". It worked like a charm. So easy and yet powerful. It
    analyzed all the HDD and suggested a partition which was exactly as
    before. It allows to look into each partition/folder to see if all the
    files are ok. Once you feel ok you can write the partition. The wiki
    also has step by step instructions! Thanks to cgsecurity. It is just
    beautiful and now I feel so much more confident. I had to update you
    all on this. Thanks for your suggestion

    NS

  8. Re: Linux stopped reading my 2nd HDD - Help!!

    DOES KUBUNTU / UBUNTU Linux take care of this problem.
    It recognizes MTNL internet flawlessly with firefox----- where the
    Debian distribution failed.
    Why don't u run VirtualBox on your Windows XP system until Kubuntu
    comes up.

    Erach


    On May 12, 10:34 am, sridhar wrote:
    > On May 12, 9:19 am, Stefan Patric wrote:
    >
    >
    >
    > > On Sat, 10 May 2008 03:05:17 -0700, sridhar wrote:
    > > > I have been running Win2k/FC8 on my first HDD (80Gb) and only FC5 on my
    > > > 2nd HDD (160Gb). MBR and Grub is on 1sr HD (sda). Things were going
    > > > smoothly until today, when I tried to boot my FC5 I got the error
    > > > "Filesystem unknown and Partition type 0x93". Grub could not load FC5.
    > > > My FC8 and Win2k are still working fine.

    >
    > > > Using fdisk I could change the partition type to 0x83 on the 2nd HDD
    > > > (sdb) for the first 3 partitions but could not change the extended
    > > > partition, which still says unknown. See below

    >
    > > > grub> geometry (hd1)
    > > > drive 0x81: C/H/S = 19457/255/63, The number of sectors = 312581808, /
    > > > dev/sdb
    > > > Partition num: 0, Filesystem type unknown, partition type 0x83
    > > > Partition num: 1, Filesystem type unknown, partition type 0x83
    > > > Partition num: 2, Filesystem type unknown, partition type 0x83
    > > > Partition num: 3, Filesystem type unknown, partition type 0x15

    >
    > > > Tried using the install CD to see if I can fix or upgrade my 2nd HD but
    > > > I got the message that partitions are not readable and the I need to
    > > > initialize the HD causing data loss. I have all my important data on my
    > > > 2nd HDD. Can some one pl. help me on how I can resurrect the FC5 and or
    > > > at least recover the data. I have to scream HELP! HELP!

    >
    > > > Thanks for your help

    >
    > > I'd guess, that your 2nd drive's partition table has been corrupted. It
    > > would help if you'd post the output, as root, from fdisk -l for both hard
    > > drives to list the current partition tables, even if the 2nd drive's
    > > isn't complete. Also, post FC8's fstab off the first hard drive. Also,
    > > with FC8 running, what does 'df -h' show? How about 'cat /proc/
    > > partitions'? If you can get the start and end sectors of each partition,
    > > you can use fdisk to recreate the partition table. Deleting a partition
    > > doesn't destroy the data on the drive.

    >
    > > If you had the space, I'd use dd to copy the entire 2nd drive as a single
    > > file, then try to fix the copy, so you can copy your data off it.

    >
    > > Stef

    >
    > Just an update.
    >
    > I was able to resolve the corrupt partition issue by using testdisk.
    > It is an unbelievable utility at "http://www.cgsecurity.org/wiki/
    > TestDisk". It worked like a charm. So easy and yet powerful. It
    > analyzed all the HDD and suggested a partition which was exactly as
    > before. It allows to look into each partition/folder to see if all the
    > files are ok. Once you feel ok you can write the partition. The wiki
    > also has step by step instructions! Thanks to cgsecurity. It is just
    > beautiful and now I feel so much more confident. I had to update you
    > all on this. Thanks for your suggestion
    >
    > NS



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