Re: Difference between IDE and SCSI ??

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Rick Stevens wrote:

The kernel treats all block-replaceable storage (hard drives, ZIP
drives, FLASH drives--basically everything except floppies and CD/DVD
drives) as though they're SCSI (regardless of their physical
connections).

CD/DVD drive are also treated as SCSI drives. You get /dev/scd0 and /dev/sr0 for the first drive, /dev/scd1 and /dev/sr1 for the second, etc. This is regardless of them being PATA, SATA, or a SCSI drive. SCSI CD/DVD drives have always used /dev/scdx.

Old kernels separated PATA/IDE drives from SCSI with the "hd" in
/dev/hd* names meaning "hard disk" (PATA/IDE) and "sd" meaning "scsi
disk".  With new kernels, you won't see "/dev/hd*" names any longer, so
it may be easier for you to think of the "sd" in /dev/sdXY device names
as "storage device" from here on in.

Tape drives are /dev/stx and /dev/nstx - each drive has both devices. (SCSI tape and Non-rewinding SCSI Tape)

One thing I have not looked at - are the special CD interfaces still handled the same, or are they SCSI devices now? (The ones that attach to sound cards, or their own special controller.) I suspect they still have their old names, because they were not IDE or SCSI drives.

Mikkel
--

  Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!

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