I recently built a filer using 750GB SATA disks and I was able to fit 25 disks before reaching the 16TB RAW limit.
I used raidsize=16 and this is how the distribution of the raid groups looks like on the filer:
Aggregate aggr2 (online, raid_dp) (block checksums) Plex /aggr2/plex0 (online, normal, active) RAID group /aggr2/plex0/rg0 (normal)
RAID Disk Device HA SHELF BAY CHAN Pool Type RPM Used (MB/blks) Phys (MB/blks) --------- ------ ------------- ---- ---- ---- ----- -------------- -------------- dparity 0d.16 0d 1 0 FC:B - ATA 7200 635555/1301618176 635858/1302238304 parity 0d.32 0d 2 0 FC:B - ATA 7200 635555/1301618176 635858/1302238304 data 0d.48 0d 3 0 FC:B - ATA 7200 635555/1301618176 635858/1302238304 data 0d.17 0d 1 1 FC:B - ATA 7200 635555/1301618176 635858/1302238304 data 0b.33 0b 2 1 FC:A - ATA 7200 635555/1301618176 635858/1302238304 data 0d.49 0d 3 1 FC:B - ATA 7200 635555/1301618176 635858/1302238304 data 0d.18 0d 1 2 FC:B - ATA 7200 635555/1301618176 635858/1302238304 data 0b.34 0b 2 2 FC:A - ATA 7200 635555/1301618176 635858/1302238304 data 0b.50 0b 3 2 FC:A - ATA 7200 635555/1301618176 635858/1302238304 data 0b.19 0b 1 3 FC:A - ATA 7200 635555/1301618176 635858/1302238304 data 0b.35 0b 2 3 FC:A - ATA 7200 635555/1301618176 635858/1302238304 data 0b.51 0b 3 3 FC:A - ATA 7200 635555/1301618176 635858/1302238304 data 0d.20 0d 1 4 FC:B - ATA 7200 635555/1301618176 635858/1302238304 data 0d.36 0d 2 4 FC:B - ATA 7200 635555/1301618176 635858/1302238304 data 0d.52 0d 3 4 FC:B - ATA 7200 635555/1301618176 635858/1302238304 data 0b.21 0b 1 5 FC:A - ATA 7200 635555/1301618176 635858/1302238304
RAID group /aggr2/plex0/rg1 (normal)
RAID Disk Device HA SHELF BAY CHAN Pool Type RPM Used (MB/blks) Phys (MB/blks) --------- ------ ------------- ---- ---- ---- ----- -------------- -------------- dparity 0b.53 0b 3 5 FC:A - ATA 7200 635555/1301618176 635858/1302238304 parity 0d.37 0d 2 5 FC:B - ATA 7200 635555/1301618176 635858/1302238304 data 0b.22 0b 1 6 FC:A - ATA 7200 635555/1301618176 635858/1302238304 data 0d.54 0d 3 6 FC:B - ATA 7200 635555/1301618176 635858/1302238304 data 0b.38 0b 2 6 FC:A - ATA 7200 635555/1301618176 635858/1302238304 data 0b.23 0b 1 7 FC:A - ATA 7200 635555/1301618176 635858/1302238304 data 0d.55 0d 3 7 FC:B - ATA 7200 635555/1301618176 635858/1302238304 data 0b.39 0b 2 7 FC:A - ATA 7200 635555/1301618176 635858/1302238304 data 0d.24 0d 1 8 FC:B - ATA 7200 635555/1301618176 635858/1302238304
This is how much it yielded in space:
Aggregate total used avail capacity aggr2 11378GB 11106GB 271GB 98% aggr2/.snapshot 351GB 11GB 340GB 3%
OR in KB:
Aggregate kbytes used avail capacity aggr2 11930898168 11646454744 284443424 98% aggr2/.snapshot 368996848 11634236 357362612 3%
Regards, -Eduardo
Stephen C. Losen wrote:
We're going to buy some shelves of 750G ATA drives. An aggregate is limited to 16T "raw" (which I presume includes parity disks). Not having any 750G drives yet, we don't know what they size down to. Can anyone tell us how many 750G disks (including parity) that you can stuff into an aggregate?
Steve Losen scl@virginia.edu phone: 434-924-0640
University of Virginia ITC Unix Support