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Re: kernel option for scsi emulation



On 11/12/2010 01:49 PM, Camaleón wrote:
On Fri, 12 Nov 2010 12:06:16 -0600, Hugo Vanwoerkom wrote:

I have 2 kernels: Debian's 2.6.32-5-686 and my own 2.6.36-hvw.

The former no longer has /dev/hd* the latter does as shown by blkid. [1]
blkid for 2.6.32-5-686 and [2] for 2.6.36-hvw.

What kernel option is responsible for that? Obviously I don't have that
set in 2.6.36-hvw.

(...)

In brief, if I got it correctly, your Maxtor hard disk (IDE) is being
detected as "/dev/hd*" in 2.6.36 (using legacy pata module) and as "/dev/
sd*" in 2.6.32 (using new libata module).

Back to days I was using openSUSE, pata modules were loaded by telling
the kernel "hwprobe=-modules.pata" at GRUB prompt (or by stating so in
menu.lst). Maybe you are inadvertenly loading legacy pata module or you
have compiled the kernel with that flag switched on :-?

Compare both "lsmod | grep ata" outputs.


Good suggestion:

hugo@Debian:/$ grep ata 11.2.6.32-5-686.lsmod
ata_generic             2047  0
libata                115745  3 ata_generic,sata_via,pata_via
pata_via                5701  4
sata_via                5608  0
scsi_mod 101401 6 ums_cypress,usb_storage,sg,sr_mod,sd_mod,libata
hugo@Debian:/$ grep ata 11.2.6.36-hvw.lsmod
ata_generic             2075  0
libata                116648  2 ata_generic,sata_via
sata_via                5380  0
scsi_mod              100151  5 sg,sd_mod,ums_cypress,usb_storage,libata


So both kernels have libata, but only 2.6.32-5-686 has pata_via and sr_mod.

Hugo



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