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Mirddes
25-05-2013, 01:35 PM
http://pricespy.co.nz/product.php?e=1706075

9 or 12 of these

$170 each 1TB with 8GB ssd 64MB cache. layered caching on the drive essentially.

linux

how fast will this be?

is this enough raid for my paranoias of dataloss?

Mirddes
25-05-2013, 01:52 PM
will mount them using these
http://dx.com/p/orico-ac325-2s-2-bay-2-5-to-3-5-ide-sata-ssd-hard-drive-aluminum-rack-black-144745
and
http://pricespy.co.nz/product.php?p=390635

i realise raid55 is not a backup so multiple backups are enabled through this

http://dx.com/p/compact-swap-4-quadruple-internal-2-5-sata-hdd-ssd-mobile-rack-enclosure-black-146287

cant make the raid too large as a backup will need to be stored on a single drive, they're up to what 3 or 4 TB now?

some rethinking is in order

Mirddes
25-05-2013, 02:04 PM
single drive, they're up to what 3 or 4 TB now?

individual 2.5" drives, they're up to what 2TB now?

inphinity
25-05-2013, 02:11 PM
raid 6 would, imo, be a more practical approach for redundancy and space efficiency.

Mirddes
25-05-2013, 02:19 PM
http://pricespy.co.nz/product.php?p=422853

i was thinking one of these 2=3 instead of the 3-4 variant

raid55 is more drives of parity, seems more reliable.

would there be any real performance difference between raid 6 and raid55?

is it safe to do this as software raid?

ill be usign several differnt controllers and software seems to be my only option

im building a multi-seat mainframe-like server thing.

this is the main board http://www.asus.com/Motherboards/E35M1M_PRO/

Mirddes
25-05-2013, 03:08 PM
raid 6 it is then.
8 drives seems most practical

Mirddes
25-05-2013, 03:27 PM
seems this idea shall not bear fruit.

http://forums.seagate.com/t5/Momentus-XT-Momentus-Momentus/Seagate-SSHD-RAID-10/td-p/193353

SSHD is unsuited to raid

Mirddes
25-05-2013, 03:47 PM
is PCI still good enough for raid?

http://dx.com/p/silicon-image-4-port-sata-pci-expansion-card-4660

Mirddes
25-05-2013, 04:43 PM
in the interest of performance, setup and cost i have decided a 3 drive raid5 shall be sufficient.

OS on a 32GB SSD
data on a 2TB raid5 array, backup onto a 3TB removable HDD

http://intrl.startech.com/HDD/Mobile-Racks/Black-525in-SATA-Hard-Drive-Mobile-Rack-Drawer~DRW110SATBK

this should be sufficient for 4 seats