[rescue] DLT drive dead want to replace without rebooting

Phil Stracchino phil.stracchino at speakeasy.net
Tue Nov 28 11:15:08 CST 2006

Brian Deloria wrote:
> Hello,
>   I've got a DLT drive that bit the dust, and I've been doing some research
> here and I'd like to hotswap the drive with it's replacement when it gets
> here, however I'm not sure how nor do I know if I can reset the scsi bus.
> The tape drive is on it's own controller which is the first good thing.
>   I'm reluctant to reboot the machine for one simple reason my predecessor
> suspected that the NVRAM had gone bad, it's been online for over 600 days,
> and if the NVRAM gets replaced then there's several software licesnses that
> are bound to the hostid which would cause a great deal of grief.
> If you have any suggestions please let me know.
> Thanks,
> Brian

You failed to specify what OS.

If it's Solaris (which it appears to be), try using devfsadm.

If it's Linux, use the following:

echo scsi remove-single-device <h> <b> <d> <l> > /proc/scsi/scsi
echo scsi add-single-device <h> <b> <d> <l> > /proc/scsi/scsi

where h,b,d,l are host, bus, device, LUN (LUN may have to be 0, I'm not

 Same geek, same site, new location
 Phil Stracchino                     Landline: 603-429-0220
 phil.stracchino at speakeasy.net         Mobile: 603-216-7037
 Renaissance Man, Unix generalist, Perl hacker, Free Stater

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