what devices are these luns on? - Redhat

This is a discussion on what devices are these luns on? - Redhat ; hi - dumb question time... RHEL AS 3 system, has 15 luns presented to it. cat /proc/scsi/scsi sees said luns .... but not fdisk -l or lvmdiskscan... how can I "see" these luns - what devices should they be on? ...

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Thread: what devices are these luns on?

  1. what devices are these luns on?

    hi - dumb question time...

    RHEL AS 3 system, has 15 luns presented to it.

    cat /proc/scsi/scsi sees said luns

    .... but not fdisk -l or lvmdiskscan...

    how can I "see" these luns - what devices should they be on?

    does somethuing else need to be done to thsi system in order to "see"
    them?

    cheers

    ian


  2. Re: what devices are these luns on?

    On Thu, 12 Apr 2007 08:01:18 -0700, didds wrote:

    > hi - dumb question time...
    >
    > RHEL AS 3 system, has 15 luns presented to it.
    >
    > cat /proc/scsi/scsi sees said luns
    >
    > ... but not fdisk -l or lvmdiskscan...
    >
    > how can I "see" these luns - what devices should they be on?
    >
    > does somethuing else need to be done to thsi system in order to "see"
    > them?


    My guess would be that it's a 15 channel scsi card with a single lun
    showing per channel.

  3. Re: what devices are these luns on?

    more info...

    Luns are presented from a SAN via a qlogic card


    /proc/scsi/scsi shows the luns present.


    e.g.
    ....
    Host: scsi1 Channel: 00 Id: 00 Lun: 14
    Vendor: HITACHI Model: OPEN-9 Rev: 2114
    Type: Direct-Access ANSI SCSI revision: 02


    /proc/scsi/qla2300/1 shows the luns also and that they are registsred
    with the OS
    e.g.
    ....
    SCSI LUN Information:
    (Id:Lun) * - indicates lun is not registered with the OS.
    ( 0: 0): Total reqs 205, Pending reqs 0, flags 0x2, 1:0:81,
    ( 0: 1): Total reqs 199, Pending reqs 0, flags 0x2, 1:0:81,
    ( 0: 2): Total reqs 209, Pending reqs 0, flags 0x2, 1:0:81,
    ( 0: 3): Total reqs 204, Pending reqs 0, flags 0x2, 1:0:81,
    ( 0: 4): Total reqs 102, Pending reqs 0, flags 0x2, 1:0:81,
    ( 0: 5): Total reqs 207, Pending reqs 0, flags 0x2, 1:0:81,
    ( 0: 6): Total reqs 100, Pending reqs 0, flags 0x2, 1:0:81,
    ( 0: 7): Total reqs 123, Pending reqs 0, flags 0x2, 1:0:81,
    ( 0: 8): Total reqs 178, Pending reqs 0, flags 0x2, 1:0:81,
    ( 0: 9): Total reqs 178, Pending reqs 0, flags 0x2, 1:0:81,
    ( 0:10): Total reqs 178, Pending reqs 0, flags 0x2, 1:0:81,
    ( 0:11): Total reqs 178, Pending reqs 0, flags 0x2, 1:0:81,
    ( 0:12): Total reqs 178, Pending reqs 0, flags 0x2, 1:0:81,
    ( 0:13): Total reqs 177, Pending reqs 0, flags 0x2, 1:0:81,
    ( 0:14): Total reqs 187, Pending reqs 0, flags 0x2, 1:0:81,


    /proc/partitons shows the "partions" available
    ....
    8 0 7211520 sda 147 561 1416 440330 0 0 0 0 0 440330 440330
    8 3 7210080 sda3 33 159 384 70 0 0 0 0 0 70 70
    8 4 1440 sda4 25 135 320 50 0 0 0 0 0 50 50
    8 5 7207920 sda5 25 135 320 400 0 0 0 0 0 400 400
    8 16 7211520 sdb 141 539 1360 282740 0 0 0 0 0 282740 282740
    8 19 7210080 sdb3 31 149 360 267610 0 0 0 0 0 267610 267610
    8 20 1440 sdb4 23 125 296 150 0 0 0 0 0 150 150
    8 21 7207920 sdb5 25 135 320 130 0 0 0 0 0 130 130
    ....

    these parttions run from sda to sdo - interestingly enough ... 15
    drives (coincidence?)

    but

    # fdisk /dev/sda

    Unable to open /dev/sda
    # fdisk /dev/sda3

    Unable to open /dev/sda3


    i need to see the luns in order to create filesystems (cutting long
    stories short etc).

    how can I create filesystems from these LUNS if fdisk is unable to op-
    en them?

    cheers

    ian


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