The change causing non-SCSI disks to appear as sdX rather than hdX is not
distro specific, it's a base kernel change. With very new kernels, both
IDE and SATA appear as SCSI disks. There is some information available
online as to why this change was made. For a brief overview, see:
http://kernelnewbies.org/Linux_2_6_19#head-cdcbaa9c1b476decdc064e0a75d23d1328b1ddce
In general, I would use rescue disks from the same distro as the installed
system. Having said that, my sysadmin hat is starting to fit poorly as
I've been a programmer for several years now, so take my advice with a
grain of salt.
Dave
On Wed, 14 Jan 2009, Brian McAllister wrote:
On 1/14/2009 at 19:22:53 EST, Brian O'Neill wrote:
> I believe it has been a general push in the latest kernels to totally
> abstract the disk controllers as scsi devices. Although there is some
> backwards compatibility for purposes of upgrades, new installations
> favor the SCSI emulation. Since the Live CDs are generally the latest
> kernel and "start fresh" like a new installation, they use this as
> well.
It seems to be specific to SATA. When I boot the RHEL4 CD on a system with
regular ATA disks, they appear as hdX.
It seems foolish for rescue mode, as there are features of ATA that cannot
be used through SCSI (such as SMART) that are useful in working with broken
systems.
----
Brian McAllister Senior Software Engineer
[email protected] Bates Research & Engineering Center
(617) 253-9537 Middleton, MA
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