RAID-5 Using an FC60

[Don Bentz]

Can somebody run down the creation of a RAID-5 AND the RAID 0/1 volumes using an FC60. I already know about the Model 12H and the VA7100, but that's not my question... Thanks.
I assume the RAID 0/1 involves using Mirror/UX?

[Yu Zhen · Accepted solution]

you can use following commands:
amcfg -L : -d , ?? -r

RAIDlevel can be 5 or 1

[Printaporn_1]

this can be easy done via sam.

[Insu Kim]

For LUNs maintenance under FC60, I think that STM is better than others.

RAID 1/0 in FC60 has nothing to do with Mirror/UX.
Mirror/UX indicates software mirroring and FC60 uses hardware mirroring as far as RAID 1 or RAID 1/0 concerned.

Hope this helps.

[Vincenzo Restuccia]

Mirror/UX indicates software mirroring and FC60 uses firmware mirroring.
You can configure RAID etc. with SAM.

[Brendan Newport]

If you prefer the command-line setup, then the amcfg command mentioned earlier is required.

Then perform;

insf -e

to create the special files. Be aware that this command may change permissions/ownership on tty files being used for modems etc if you've changed such files from their defaults in the past.

At this point you will have device files for the new LUN (either RAID 1 or 5) The difficulty of course is identifying the files. I normally know precisely which files are going to be created, based on previous LUNS and hardware paths. For a new system it'll be wise to take an

ioscan -funCdisk

listing beforehand.

Identify the new LUN from another ioscan -funCdisk listing. You will also have an alternate path (or should do) so make a note of the alternate path device file.

pvcreate the new LUN, on the primary path you intend to use. i.e.

pvcreate /dev/rdsk/ctd

Add both the primary and alternate path to the LUN to your chosen volume group. Again your listing of ;

vgextend /dev/vg /dev/dsk/ctd

vgextend /dev/vg /dev/dsk/

vgdisplay -v /dev/vg | more will show the new LUN (and its alternate path) added.

The LUN capacity can now be used for logical volumes.

There is a bit more, but that concerns balancing the LUNS across controllers for redundancy and load. This is defined by the amcfg command flag used earlier. The end result is that your device files will reflect the hardware path for each controller. The end result is that you will balance the load through the LUN's. i.e (for a vol group with some RAID 5 LUN's);

--- Physical volumes ---
PV Name /dev/dsk/c11t0d0
PV Name /dev/dsk/c6t0d0 Alternate Link
PV Status available
Total PE 17343
Free PE 0
Autoswitch On

PV Name /dev/dsk/c10t0d1
PV Name /dev/dsk/c5t0d1 Alternate Link
PV Status available
Total PE 17343
Free PE 0
Autoswitch On

PV Name /dev/dsk/c11t0d2
PV Name /dev/dsk/c6t0d2 Alternate Link
PV Status available
Total PE 17343
Free PE 0
Autoswitch On

PV Name /dev/dsk/c10t0d3
PV Name /dev/dsk/c5t0d3 Alternate Link
PV Status available
Total PE 17343
Free PE 0
Autoswitch On


Remember RAID 5 will require global hot spares to be set-up, in the event of a disk fail.

[Don Bentz]

Brendan, now THAT's an answer. Thanks.