On 4 February 2013 20:29, Mathias Burén <mathias.buren@xxxxxxxxx> wrote:
> On 4 February 2013 20:27, Mathias Burén <mathias.buren@xxxxxxxxx> wrote:
>> Hi list,
>>
>> I've an Intel Atom 330 running 32-bit Ubuntu, ~3.5GB RAM. The intent
>> is to store large media files (>4GB) for streaming by maximum 3
>> clients at any time. Very read heavy.
>> 6x 2TB HDDs are available, the crux is that 3 HDDs are on the on-board
>> SATA controller, the other 3 are on a Marvel PCI-E adapter
>>
I was clearly not thinking when doing this. Now it's a 6 disk RAID10
with far layout, 2 copies. Is the default chunk size of 512 a good
option here?
$ sudo mdadm --verbose --create md0 --level=10 --layout=f2
--raid-devices=6 /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sdg
mdadm: chunk size defaults to 512K
mdadm: size set to 1953382912K
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md/md0 started.
$ cat /proc/mdstat
Personalities : [raid10] [raid0]
md127 : active raid10 sdg[5] sdf[4] sde[3] sdd[2] sdc[1] sdb[0]
5860147200 blocks super 1.2 512K chunks 2 far-copies [6/6] [UUUUUU]
[>....................] resync = 0.0% (775616/5860147200)
finish=629.5min speed=155123K/sec
unused devices: <none>
@ion:~$ sudo mdadm -D /dev/md/md0
/dev/md/md0:
Version : 1.2
Creation Time : Mon Feb 4 20:40:22 2013
Raid Level : raid10
Array Size : 5860147200 (5588.67 GiB 6000.79 GB)
Used Dev Size : 1953382400 (1862.89 GiB 2000.26 GB)
Raid Devices : 6
Total Devices : 6
Persistence : Superblock is persistent
Update Time : Mon Feb 4 20:40:22 2013
State : clean, resyncing
Active Devices : 6
Working Devices : 6
Failed Devices : 0
Spare Devices : 0
Layout : far=2
Chunk Size : 512K
Resync Status : 0% complete
Name : ion:md0 (local to host ion)
UUID : 438e9a1a:bf840b03:05c36383:c965cb39
Events : 0
Number Major Minor RaidDevice State
0 8 16 0 active sync /dev/sdb
1 8 32 1 active sync /dev/sdc
2 8 48 2 active sync /dev/sdd
3 8 64 3 active sync /dev/sde
4 8 80 4 active sync /dev/sdf
5 8 96 5 active sync /dev/sdg
Kind regards,
Mathias
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
