MSA 1000 and Linux AS 3 Update 5.

[Silver_1]

All,

I have a Linux machine where a database is running and filesystems are created on LUNs from an MSA 1000 attached to this machine.

I need to recreate the LUNs so that i can create 3 volumes groups using different LUNs.


Here is a snapshot of the /proc/partitions


65 0 10485600 sdq 119 97 912 510 11020 256441 556258 1118990 0 5620 1119520
8 0 3145680 sda 27321 127730 1238770 150240 21557323 23310080 358940200 1922080 0 1517530 2071800
8 16 5242800 sdb 224 327 3682 10580 14878660 25267871 321172248 750440 0 563600 760690
8 32 3145680 sdc 121215 2125 985994 1112750 4177989 3718291 63170232 1218230 0 1886400 2330050
8 48 3145680 sdd 121193 110 969698 510750 4168664 3727587 63170008 1201440 0 1208290 1711750
8 64 3145680 sde 206 1738 14826 6750 19150049 15891793 280334712 447590 0 328430 454120
8 80 39845280 sdf 185 122 1706 3570 170053 3264343 27504792 2337655 0 436400 2421605
8 96 39845280 sdg 142 122 1362 3050 85854 1774617 14892816 27440224 0 236450 27459544
8 112 39845280 sdh 1626 128 13282 6750 182116 4040742 33809256 6731602 0 532130 6795842
8 128 39845280 sdi 178 119 1626 3590 173318 2998192 25401928 29710898 0 403800 29813608
8 144 39845280 sdj 140 114 1282 3370 107628 2014561 16993616 9066981 0 278640 9112681
8 160 17825520 sdk 381 132 3378 2150 55718 1017434 8589336 18899527 0 135870 18909987
8 176 17825520 sdl 444 129 3858 2730 112275 2535988 21195648 34404261 0 333230 34426411
8 192 17825520 sdm 115 115 1114 1310 29445 255399 2281376 15050630 0 35740 15057360
8 208 17825520 sdn 114 115 1106 650 26679 258423 2281344 13551090 0 33320 13553420
8 224 17825520 sdo 158 174 1930 2420 45921 342557 3108712 15179340 0 42740 15188170
8 240 314573823 sdp 452 434 4322 840 24417 125664 1200648 11650 0 5120 12490


As you can see i have now /dev/sda to /dev/sdq.

Once i destory the luns and recreate with different sixes, will the luns will have the same device files.

eg: the first lun will be /dev/sda itself.

If that is not the case, what should i do to make the new devices to start using in the order /dev/sda, /dev/sdb ...etc.

Any help is appreciated ?

[Steven E. Protter]

Shalom,

If you can, boot the machine and remove the device files with the MSA not connected.

rmsf is the command that will probably do the job.

Then shut the system down, reconnect the system to the MSA and see what the results are.

The device names are a function of how the LUNS are configured on the MSA device.

Of course you could do a fresh OS install but thats a lot of work to solve this issue.

SEP