SUMMARY: Raid question

From: SIMEONE, Allan J. <Allan.SIMEONE_at_rp-rorer.com>
Date: Tue, 17 Mar 1998 16:25:33 -0500

Hi,

I got back excellent responses. Thanks to:
Stan Horwitz
Bill CArlson
Christian Miranda
John Becker
Mandell Degerness
Jeff Beck
and Alan _at_nabeth.cxo.dec.com.

Basically everyone said doing the file command on /dev/rrz*c would give
the answer.
After a few e-mails back and forth with Alan_at_nabeth.cxo.dec.com, I got
the full details
I really needed to get the answer.

Here are the steps I took....

1) file /dev/rrzb43c, that showed me...

     scsi #5 and scsi id #3, which is Bus 5 and Target 3. Lun 1 is from
the "b" in rrzb43c

2) scu show edt

   look for a device not present on bus 5.

3) hszterm -b 5 -t 3 -l 3 (which is not present on my system. Anything
from bus 5 is ok that
                                     is not present)

4) from the HSZ prompt:
   show units
   My system comes up with D101, D201 and D301.
   
   I know it is D301 because the 1 is the Lun number which is b in
rrzb43.
   The 3 is the scsi id number taken from the file command on
/dev/rrzb43c
   I know I'm on the right bus also since I did a hszterm -b 5 which I
got from
   the file command which is the scsi number.

D301 uses R1

5) show R1 will shows me disk200, disk210, disk220 and disk230. .

so rzb43c is disk200 disk210 disk220 and disk230 on my system.

another example would be rzb51c which is on bus 6 and is also lun 1
and scsi id 3. This is also D301 but points to a stripeset using
different
disks.

thanks all!
Allan

>----------
>From: SIMEONE, Allan J.
>Sent: Tuesday, March 17, 1998 12:13PM
>To: 'alpha-osf-managers_at_ornl.gov'
>Subject: Raid question
>
>Hello,
>
>I need a little help identifying disks.
>
>how can I tell what rz device is associated with an hsz device(s)?
>
>for example, below are the disks I have. How can I tell which rz device
>goes with
>with stripeset 4?
>
>thanks,
>allan
>
>on my system I have the following....
>
>rrz36c
>rrz44c
>rrzb17c
>rrzb41c
>rrzb42c
>rrzb43c
>rrzb49c
>rrzb50c
>rrzb51c
>rrzb52c
>
>HSZ> show disks
>
>Name Type Port Targ Lun Used by
>------------------------------------------------------------------------
>------
>
>DISK100 disk 1 0 0 M1
>DISK110 disk 1 1 0 M7
>DISK120 disk 1 2 0 S3
>DISK140 disk 1 4 0 M12
>DISK150 disk 1 5 0 M6
>DISK200 disk 2 0 0 M2
>DISK210 disk 2 1 0 M8
>DISK220 disk 2 2 0 S3
>DISK240 disk 2 4 0 M11
>DISK250 disk 2 5 0 M5
>DISK300 disk 3 0 0 M3
>DISK310 disk 3 1 0 M9
>DISK340 disk 3 4 0 M10
>DISK350 disk 3 5 0 M4
>DISK400 disk 4 0 0 M4
>DISK410 disk 4 1 0 M10
>DISK440 disk 4 4 0 M9
>DISK450 disk 4 5 0 M3
>DISK500 disk 5 0 0 M5
>DISK510 disk 5 1 0 M11
>DISK530 disk 5 3 0 S4
>DISK540 disk 5 4 0 M8
>DISK550 disk 5 5 0 M2
>DISK600 disk 6 0 0 M6
>DISK610 disk 6 1 0 M12
>DISK630 disk 6 3 0 S4
>DISK640 disk 6 4 0 M7
>DISK650 disk 6 5 0 M1
>HSZ> show s4
>
>Name Storageset Uses Used by
>------------------------------------------------------------------------
>------
>
>S4 stripeset DISK530 D401
> DISK630
> Switches:
> CHUNKSIZE = 256 blocks
> State:
> NORMAL
>
>
>
Received on Tue Mar 17 1998 - 22:27:06 NZST

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