perc2/dc and CentOS/RHEL4

Matt Domsch Matt_Domsch at
Sun Dec 10 07:31:56 CST 2006

On Sun, Dec 10, 2006 at 12:38:41AM -0600, Gerard Louviere wrote:
> if i go linux software raid, can i still use the hot-swap drives?

Electrically, yes.  Logically, just as with the PERC you want to use
OMSA or dellmgr to prepare a drive for removal, you'll want to do the
same thing using "echo scsi-remove-single-device 0 0 N 0 >
/proc/scsi/scsi", remove the disk, then "scsi-add-single-device" (on
RHEL4; similar incantation on newer 2.6 kernel-based products with
current sysfs) and the appropriate mdadm command for it to recognize
the new disk.  It's not quite as simple as the hardware RAID
solutions, but not that hard.

Matt Domsch
Software Architect
Dell Linux Solutions &
Linux on Dell mailing lists @

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