2010-08-12 11:48 AM
is it possible to change the raidsize live.
situation now is fas 2050c (7.3.2p4) with 34 (1 TB sata disk), 17 to each head. created an aggr0 with default raidsize = 14, which then ends up with 12 data disks + 2 dp and 3 spares / head.
so when increasing the raidsize to 16 I could add 2 disks to the aggr0, leaving one dedicated spare/head.
big question, can the raidsize changed live? without data loss?
2010-08-18 05:17 AM
You can customize the size of your RAID groups based on your requirements for data availability, performance, and disk utilization.
You change the size of RAID groups on a per-aggregate basis, by setting the raidsize aggregate option. You cannot change the size of individual RAID groups.
The following list outlines some facts about changing the raidsize aggregate option:
Enter the following command: aggr options aggr_name raidsize size
The following command changes the raidsize setting of the aggregate aggr3 to 16 disks or array LUNs:
aggr options aggr3 raidsize 16
When disks are added to an existing volume, the filer will attempt to keep the amount of data stored on each disk about equal.
By adding a minimum of three disks at a time to a volume, the throughput to disk is increased by providing more disks to write to at a given time.