I switched to libata drivers for my onboard PATA controller (PIIX4) recently.
Everything works fine except that kernel tries to start not only my hard
drive (sda) but also LS-120 floppy drive (sdb) which does not like it:

sd 0:0:0:0: [sda] Starting disk
ata1.00: configured for UDMA/33
sd 0:0:0:0: [sda] 58633344 512-byte hardware sectors (30020 MB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
sd 1:0:1:0: [sdb] Starting disk
ata2.00: configured for UDMA/33
ata2.01: configured for PIO2
sd 1:0:1:0: [sdb] Result: hostbyte=0x00 driverbyte=0x08
sd 1:0:1:0: [sdb] Sense Key : 0x2 [current]
sd 1:0:1:0: [sdb] ASC=0x3a ASCQ=0x0

The question is: is it correct? Or a patch like this should be applied?

--- linux-2.6.23-orig/drivers/ata/libata-scsi.c 2007-10-09 22:31:38.000000000 +0200
+++ linux-2.6.23-pentium/drivers/ata/libata-scsi.c 2008-01-05 15:50:16.000000000 +0100
@@ -802,7 +802,8 @@

blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);

- sdev->manage_start_stop = 1;
+ if (dev->class == ATA_DEV_ATA)
+ sdev->manage_start_stop = 1;

if (dev)
ata_scsi_dev_config(sdev, dev);

Ondrej Zary
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