Re: How do I spin up a SCSI disk after being hot swapped?

[Marc SCHAEFER]

Tomas Fasth <[EMAIL PROTECTED]> wrote:
> problem is that the newly inserted disk never get ordered to spin up.

Something that could be done (which used to be done in the scsi-idle
patch) was to detect NOT READY, POWER UP COMMAND REQUIRED (0x2 0x2A
or something like this) sense and to send a START/STOP UNIT with the
appropriate START bit set.

Thus a simple

  dd if=/dev/sda bs=512 count=1

could revive the hard disk.

In the mean time, you can send, with `sg' that command. Or
set the disk jumper.