SCSI ID <--> filesystem

[Nachman Yaakov Ziskind]

.... a particular (5.0.6) server has a SCSI backplane with four hard disks
hanging off of it. All I know is the SCSI ID (it is the position in the
backplane; right-most is ID 0, next is ID 1, and so on).

How do I tell which filesystem is on which disk. IOW, how do I match up a given
filesystem with its hd's SCSI ID? The best I've come up with so far is to re-
run mkdev hd (*it* knows the answer), but that's a little bit nerve-wracking.
There must be a better way, right?

Thanks!

--
_________________________________________
Nachman Yaakov Ziskind, EA, LLM [email]awacs@egps.com[/email]
Attorney and Counselor-at-Law [url]http://yankel.com[/url]
Economic Group Pension Services [url]http://egps.com[/url]
Actuaries and Employee Benefit Consultants

[Bela Lubkin]

Nachman Yaakov Ziskind wrote:

> ... a particular (5.0.6) server has a SCSI backplane with four hard disks
> hanging off of it. All I know is the SCSI ID (it is the position in the
> backplane; right-most is ID 0, next is ID 1, and so on).
>
> How do I tell which filesystem is on which disk. IOW, how do I match up a given
> filesystem with its hd's SCSI ID? The best I've come up with so far is to re-
> run mkdev hd (*it* knows the answer), but that's a little bit nerve-wracking.
> There must be a better way, right?

The tool you want is John DuBois's `divisions`:

[url]ftp://ftp.armory.com/pub/admin/divisions[/url]

Try `divisions -tu`.

>Bela<

[Mike Brown]

Nachman Yaakov Ziskind wrote:

>
> ... a particular (5.0.6) server has a SCSI backplane with four hard disks
> hanging off of it. All I know is the SCSI ID (it is the position in the
> backplane; right-most is ID 0, next is ID 1, and so on).
>
> How do I tell which filesystem is on which disk. IOW, how do I match up a given
> filesystem with its hd's SCSI ID? The best I've come up with so far is to re-
> run mkdev hd (*it* knows the answer), but that's a little bit nerve-wracking.
> There must be a better way, right?
>
> Thanks!
>
> --
> _________________________________________
> Nachman Yaakov Ziskind, EA, LLM [email]awacs@egps.com[/email]
> Attorney and Counselor-at-Law [url]http://yankel.com[/url]
> Economic Group Pension Services [url]http://egps.com[/url]
> Actuaries and Employee Benefit Consultants

With the system idle, try writing a large file to each filesystem and
see which drive lights up ( assuming there is an LED for that ).

Some RAID controllers can remap the reported SCSI ID to the real ID,
which can be confusing. Some versions of DPT did move the first
defined array to a reported SCSI ID of 0, even if the drives where
at 2 & 3 !

Mike

--
Michael Brown

The Kingsway Group