SCSI drive mappings

[Jerry Feldman]

On 07/20/2009 08:32 AM, Matthew Gillen wrote:
> On 07/19/2009 04:25 PM, Jerry Feldman wrote:
>  =20
>> Drive mappings in Linux are somewhat arbitrary. My specific problem is=

>> that I have a SCSI box, 2 controllers 5 slots each with roughly 9 driv=
es
>> currently plugged in. Looking at LVM, one drive, /dev/sdd, has not bee=
n
>> allocated. The issue is that I want to figure out what physical drive =
it
>> is.=20
>>    =20
>
> "hdparm -I /dev/sdd" will give you a serial number that you could check=

> against the physical drive, if you can get in a peek at that.
>
>  =20
>> The second problem is that this is a production drive and I don't
>> want to have to shut it down.
>>    =20
>
> Unless you have a really slick computer case that would let you look at=
 the
> drive serial numbers without taking them out, I'm not sure how you'd ma=
nage to
> not shut it down.
>
>  =20
>> Unfortunately, it is not hot-swap in that if I place a drive into an e=
mpty
>> slot, the system will not recognize it. I do know which physical drive=
 is
>> the boot drive, so I could conceivably take down NFS and unmount the L=
VM
>> volumes.
>>    =20
>
> I'm confused as to whether sdd is current a PV used by LVM, but not act=
ually
> in use, or if it's just an unused drive.  I think you've got an extra s=
tep to
> do if it's the former.
>
>  =20
Apparently it is a physical drive that has never been added to a VG. I
think I might have labeled all the drives when I upgraded to RHEL 5.2, I
think I may Right now they are upgrading the Internet connections, and
there is a lot of stuff blocking our rack. In any case, just a question.

--=20
Jerry Feldman <gaf-mNDKBlG2WHs at public.gmane.org>
Boston Linux and Unix
PGP key id: 537C5846
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