[ale] Suse migrations II

Jim Kinney jim.kinney at gmail.com
Tue Apr 19 19:33:17 EDT 2011 

What a nightmare! Hitachi is being bought by Seagate so maybe that crappy
design will hit the bit bucket.

On Tue, Apr 19, 2011 at 6:48 PM, Greg Freemyer <greg.freemyer at gmail.com>wrote:

> Damon,
>
> Hitachi is weird mainframe storage.  It has weird workarounds that
> won't apply to your new SAN.  Your new SAN should be able to export
> the whole /dev/sddlmag1 sized logical volume, as a single volume.  So
> you really don't care how it came to be in a Hitachi world.
>
> == but maybe this will help you satisfy your curiosity
>
> you saw these links in your output, right?
>
> scsi-1HITACHI_770131020049 -> ../../sdb
> scsi-1HITACHI_770131020050 -> ../../sda
> scsi-1HITACHI_770131020051 -> ../../sdc
> scsi-1HITACHI_770131020091 -> ../../sdd
> scsi-1HITACHI_770131020126 -> ../../sde
> scsi-1HITACHI_770131020127 -> ../../sdf
> scsi-1HITACHI_770131020128 -> ../../sdg
>
> So that I believe is your 7 volumes as exported by Hitachi.
>
> It has been a while, but if I recall correctly, the Hitachi hardware
> can only export relatively small volumes.  So each of the above I
> suspect is small.  Maybe 64GB each?
>
>  (My memory is actually 4GB max per Hitachi volume, but I don't trust
> that memory.)
>
> Hitachi then provided their own proprietary LVM like software to merge
> all the above together.  The reason being they wanted the same CLI
> tools to work in various UNIX/Linux environment.
>
> If one of your co-workers is a Hitachi storage person, they can
> probably tell you what tools are used to see how the 7 volumes are
> combined into one.
>
> Then it looks like LVM is layered on top to break it back apart.
>
> It may sound crazy, but if I recall right, a large Hitachi setup could
> have literally hundreds of exported volumes, so trusting native volume
> management tools to work was not a good idea.
>
>
> Greg
>
> On Tue, Apr 19, 2011 at 12:03 PM, Damon Chesser <dchesser at acsi2000.com>
> wrote:
> > Here is my problem:  I have 7 mount that are from FC on a hitatchi.  Suse
> > 10.2 on a HP server (6 series?) with two qlogic cards.
> >
> >
> >
> > I have one phys. Drive presented on the server /dev/ccsis/c0d0
> >
> >
> >
> > LVM is in use, everything is mounted as a LV except for /boot and /root
> on
> > c0d0 (c0d0p1, c0d0p2)
> >
> >
> >
> > I can run vgdisplay –v FOO and find out what “drive” FOO is mounted on:
> in
> > part:
> >
> >
> >
> > --- Logical volume ---
> >
> >   LV Name                /dev/FOO/FOO
> >
> >  VG Name                FOO
> >
> >   LV UUID                ZC0ZlW-UK4r-TC6j-Yvj2-qf7Y-34Dc-eNL5On
> >
> >   LV Write Access        read/write
> >
> >   LV Status              available
> >
> >   # open                 2
> >
> >   LV Size                248.99 GB
> >
> >   Current LE             63742
> >
> >   Segments               1
> >
> >   Allocation             inherit
> >
> >   Read ahead sectors     0
> >
> >   Block device           253:0
> >
> >
> >
> >   --- Physical volumes ---
> >
> >   PV Name               /dev/sddlmag1
> >
> >   PV UUID               kkzkQD-uxqX-Sgp1-bS0j-jWhq-AoI0-kASm6O
> >
> >   PV Status             allocatable
> >
> >   Total PE / Free PE    63742 / 0
> >
> >
> >
> > What the heck is /dev/sddlmag1  (that is SDDLmag1)?  I have all my FC
> > mounted as /dev/SDDLxxxx and I can’t map that to any of the below:
> >
> >
> >
> >
> >
> > ls -la /dev/sddlmag1
> >
> > brw-r----- 1 root disk 251, 97 Mar 21 09:31 /dev/sddlmag1
> >
> >
> >
> > I know by the size of the various LVM Volume Groups and by fdisk –l
> /dev/sdX
> > that there is a one to one correlation between sddlxxxx and /dev/sdx, but
> > except for one drive(FC mount) there are multiple choices based on size.
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > /dev/disk # ls -la by-id/
> >
> > total 0
> >
> > drwxr-xr-x 2 root root 400 Mar 21 09:31 .
> >
> > drwxr-xr-x 5 root root 100 Mar 21 09:31 ..
> >
> > lrwxrwxrwx 1 root root  16 Mar 21 09:31
> > cciss-3600508b10010343956584f3134380001 -> ../../cciss/c0d0
> >
> > lrwxrwxrwx 1 root root  18 Mar 21 09:31
> > cciss-3600508b10010343956584f3134380001-part1 -> ../../cciss/c0d0p1
> >
> > lrwxrwxrwx 1 root root  18 Mar 21 09:31
> > cciss-3600508b10010343956584f3134380001-part2 -> ../../cciss/c0d0p2
> >
> > lrwxrwxrwx 1 root root  18 Mar 21 09:31
> > cciss-3600508b10010343956584f3134380001-part3 -> ../../cciss/c0d0p3
> >
> > lrwxrwxrwx 1 root root   9 Mar 21 09:31 scsi-1HITACHI_770131020049 ->
> > ../../sdb
> >
> > lrwxrwxrwx 1 root root  10 Mar 21 09:31 scsi-1HITACHI_770131020049-part1
> ->
> > ../../sdb1
> >
> > lrwxrwxrwx 1 root root   9 Mar 21 09:31 scsi-1HITACHI_770131020050 ->
> > ../../sda
> >
> > lrwxrwxrwx 1 root root  10 Mar 21 09:31 scsi-1HITACHI_770131020050-part1
> ->
> > ../../sda1
> >
> > lrwxrwxrwx 1 root root   9 Mar 21 09:31 scsi-1HITACHI_770131020051 ->
> > ../../sdc
> >
> > lrwxrwxrwx 1 root root  10 Mar 21 09:31 scsi-1HITACHI_770131020051-part1
> ->
> > ../../sdc1
> >
> > lrwxrwxrwx 1 root root   9 Mar 21 09:31 scsi-1HITACHI_770131020091 ->
> > ../../sdd
> >
> > lrwxrwxrwx 1 root root  10 Mar 21 09:31 scsi-1HITACHI_770131020091-part1
> ->
> > ../../sdd1
> >
> > lrwxrwxrwx 1 root root   9 Mar 21 09:31 scsi-1HITACHI_770131020126 ->
> > ../../sde
> >
> > lrwxrwxrwx 1 root root  10 Mar 21 09:31 scsi-1HITACHI_770131020126-part1
> ->
> > ../../sde1
> >
> > lrwxrwxrwx 1 root root   9 Mar 21 09:31 scsi-1HITACHI_770131020127 ->
> > ../../sdf
> >
> > lrwxrwxrwx 1 root root  10 Mar 21 09:31 scsi-1HITACHI_770131020127-part1
> ->
> > ../../sdf1
> >
> > lrwxrwxrwx 1 root root   9 Mar 21 09:31 scsi-1HITACHI_770131020128 ->
> > ../../sdg
> >
> > lrwxrwxrwx 1 root root  10 Mar 21 09:31 scsi-1HITACHI_770131020128-part1
> ->
> > ../../sdg1
> >
> >
> >
> > /dev/disk # ls -la by-path/
> >
> > total 0
> >
> > drwxr-xr-x 2 root root 400 Mar 21 09:31 .
> >
> > drwxr-xr-x 5 root root 100 Mar 21 09:31 ..
> >
> > lrwxrwxrwx 1 root root  16 Mar 21 09:31 pci-0000:0b:08.0-cciss-0:40000000
> ->
> > ../../cciss/c0d0
> >
> > lrwxrwxrwx 1 root root  18 Mar 21 09:31
> > pci-0000:0b:08.0-cciss-0:40000000-part1 -> ../../cciss/c0d0p1
> >
> > lrwxrwxrwx 1 root root  18 Mar 21 09:31
> > pci-0000:0b:08.0-cciss-0:40000000-part2 -> ../../cciss/c0d0p2
> >
> > lrwxrwxrwx 1 root root  18 Mar 21 09:31
> > pci-0000:0b:08.0-cciss-0:40000000-part3 -> ../../cciss/c0d0p3
> >
> > lrwxrwxrwx 1 root root   9 Mar 21 09:31 pci-0000:16:00.0-scsi-0:0:0:0 ->
> > ../../sda
> >
> > lrwxrwxrwx 1 root root  10 Mar 21 09:31
> pci-0000:16:00.0-scsi-0:0:0:0-part1
> > -> ../../sda1
> >
> > lrwxrwxrwx 1 root root   9 Mar 21 09:31 pci-0000:16:00.0-scsi-0:0:0:1 ->
> > ../../sdb
> >
> > lrwxrwxrwx 1 root root  10 Mar 21 09:31
> pci-0000:16:00.0-scsi-0:0:0:1-part1
> > -> ../../sdb1
> >
> > lrwxrwxrwx 1 root root   9 Mar 21 09:31 pci-0000:16:00.0-scsi-0:0:0:2 ->
> > ../../sdc
> >
> > lrwxrwxrwx 1 root root  10 Mar 21 09:31
> pci-0000:16:00.0-scsi-0:0:0:2-part1
> > -> ../../sdc1
> >
> > lrwxrwxrwx 1 root root   9 Mar 21 09:31 pci-0000:16:00.0-scsi-0:0:0:3 ->
> > ../../sdd
> >
> > lrwxrwxrwx 1 root root  10 Mar 21 09:31
> pci-0000:16:00.0-scsi-0:0:0:3-part1
> > -> ../../sdd1
> >
> > lrwxrwxrwx 1 root root   9 Mar 21 09:31 pci-0000:16:00.0-scsi-0:0:0:4 ->
> > ../../sde
> >
> > lrwxrwxrwx 1 root root  10 Mar 21 09:31
> pci-0000:16:00.0-scsi-0:0:0:4-part1
> > -> ../../sde1
> >
> > lrwxrwxrwx 1 root root   9 Mar 21 09:31 pci-0000:16:00.0-scsi-0:0:0:5 ->
> > ../../sdf
> >
> > lrwxrwxrwx 1 root root  10 Mar 21 09:31
> pci-0000:16:00.0-scsi-0:0:0:5-part1
> > -> ../../sdf1
> >
> > lrwxrwxrwx 1 root root   9 Mar 21 09:31 pci-0000:16:00.0-scsi-0:0:0:6 ->
> > ../../sdg
> >
> > lrwxrwxrwx 1 root root  10 Mar 21 09:31
> pci-0000:16:00.0-scsi-0:0:0:6-part1
> > -> ../../sdg1
> >
> >
> >
> >
> >
> > ls -la by-uuid/
> >
> > total 0
> >
> > drwxr-xr-x 2 root root 600 Mar 21 09:31 .
> >
> > drwxr-xr-x 5 root root 100 Mar 21 09:31 ..
> >
> > lrwxrwxrwx 1 root root  10 Mar 21 09:31
> 13026f96-7d44-4509-aa94-35395448e110
> > -> ../../dm-2
> >
> > etc etc listing all the LVM logical volumes
> >
> >
> >
> >
> >
> > So, while to migrate off of Suse, I only need the max. amount of storage
> > each box is using, it is driving me up the wall that I can’t say
> > /dev/SDDLmag1 ==/dev/sda or that /dev/sdb is used by VG foo and has lv
> bar
> > on it.
> >
> >
> >
> > You all gave me such good advice on how to start mapping the info so I
> could
> > set up a target server to migrate to, I figured I would bounce this off
> of
> > the list.  Most of the employees here are Unix so they don’t know Linux
> dev
> > mappings (which is why they hired me, but I have not worked with FC).
> >
> >
> >
> > Please include me in the reply so I can read them at work.
> >
> >
> >
> >  Sincerely,
> >
> >
> >
> > Damon Chesser
> >
> > damon at damtek.com
> >
> >
> >
> >
> >
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>
> --
> Greg Freemyer
> Head of EDD Tape Extraction and Processing team
> Litigation Triage Solutions Specialist
> http://www.linkedin.com/in/gregfreemyer
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>
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>
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-- 
-- 
James P. Kinney III
I would rather stumble along in freedom than walk effortlessly in chains.
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