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Old 03-09-2006, 04:25 AM   #1
ronanio
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enterprise SAN environment woes


I have a number of questions..

I have 2 qlogic hbas in my linux machine.. Slamd64 (slackware for 64bit)

when i present on disk to it I see four copies after i rescan the fabric...

This i can understand due to our san design.

we have two EVAs with two switches each in front of each of them with another 2 links (the fabrics) between the four switches.
Failover is the name of the game....

So i can see four disks... which one do i use? w of them can be partitioned and the other 2 cannot... (obviously this is the failover in the qla module i presume and that they couldn't not be used at the same time due to data corruption etc etc) what is an "easy" wasy to manage them?

Then to complicate further i added another identical disk from the other EVA and presented it... so now i have 8 logical scsi disks..#
sda is my local scsi 320 disk

root@scarab:/san/mysql# lsscsi
[0:0:0:0] disk LSILOGIC 1030 IM IM 1000 /dev/sda
[5:0:0:0] storage COMPAQ HSV110 (C)COMPAQ 3025 -
[5:0:0:1] disk COMPAQ HSV110 (C)COMPAQ 3025 /dev/sdb
[5:0:1:0] storage COMPAQ HSV110 (C)COMPAQ 3025 -
[5:0:1:1] disk COMPAQ HSV110 (C)COMPAQ 3025 /dev/sdc
[5:0:2:0] storage COMPAQ HSV110 (C)COMPAQ 3025 -
[5:0:2:1] disk COMPAQ HSV110 (C)COMPAQ 3025 /dev/sdh
[5:0:3:0] storage COMPAQ HSV110 (C)COMPAQ 3025 -
[5:0:3:1] disk COMPAQ HSV110 (C)COMPAQ 3025 /dev/sdi
[6:0:0:0] storage COMPAQ HSV110 (C)COMPAQ 3025 -
[6:0:0:1] disk COMPAQ HSV110 (C)COMPAQ 3025 /dev/sdd
[6:0:1:0] storage COMPAQ HSV110 (C)COMPAQ 3025 -
[6:0:1:1] disk COMPAQ HSV110 (C)COMPAQ 3025 /dev/sde
[6:0:2:0] storage COMPAQ HSV110 (C)COMPAQ 3025 -
[6:0:2:1] disk COMPAQ HSV110 (C)COMPAQ 3025 /dev/sdf
[6:0:3:0] storage COMPAQ HSV110 (C)COMPAQ 3025 -
[6:0:3:1] disk COMPAQ HSV110 (C)COMPAQ 3025 /dev/sdg



i now have for the time being setup md0 as a raid 1 device with my 2 30G drives configured... im arbitrarily using

cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sdg1[1] sdb1[0]
31457152 blocks [2/2] [UU]

unused devices: <none>

as the two handles for the drives...
df
/dev/md0 30963692 6693176 22697656 23% /san

how do i get the persistent binding i hear so much about and how do i properly manage the failover??

Any experiece that can be shred will be VERY helpful.

Ronan
 
Old 03-10-2006, 02:41 PM   #2
dbogdan
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Location: Metro Detroit, US
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FWIW... I've seen the exact same thing on that site from time to time, didn't matter if I was using FF or IE or whatever.... tried it again a couple hours later and it was fine..

I'd say it's a problem of theirs not yours...

Whoops.... ignore that... wrong thread... geesh....

Last edited by dbogdan; 03-11-2006 at 06:45 PM.
 
Old 03-14-2006, 06:11 AM   #3
ronanio
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Registered: Sep 2004
Posts: 54

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come on LQ ppls... there must be others out there using linux in a SAN env...?? no-one has had to deal with any of the issues highlighed above?

Ronan
 
Old 03-14-2006, 06:53 AM   #4
shyjuk
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Registered: Aug 2005
Location: India,Kerala,Kannur
Distribution: shyju
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Hi all,
Which is the best book for studying linux for
attending exam RHCE.Do any one have the idea about

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