MSA1000

[matos]

We have got an HP San Array MSA1000 and we are expanding one LUN.
Since then the Oracle Data Base writing has slow down more than 10 times so as the proper expansion itself…
Can someone give us a clue why is this happening

Thank you in advance

[Patrick Terlisten]

Hello,

has the expansion finished or is it still running?

Best regards,
Patrick

[matos]

It is still running, still on 33%,after 13 days.
Thank you

[Patrick Terlisten]

Hello,

how many logical drives, disks and arrays are on your MSA1000? Are there logical drives behind the volume, that you currently expand?

Expansion is a io-intensive process, and can take a long time, especially in heavy-io enviroments. The MSA controller have to distribute the data to expand the logical volume. If there are volumes behind the volume that you expand, the controller will relocate the data of the volumes so get enough free space behind the volume that you expand.

Best regards,
Patrick

[matos]

We have 42 disk, 5 arrays and 13 logicaL drives. The logical drive that is expanding belongs to a array which has not another logical drive.