topic Re: VA7100 diferent RAID modes and usable capacity in Disk Enclosures

VA7100 diferent RAID modes and usable capacity

Sebastian Viudez Ortega — Mon, 03 Dec 2001 10:18:43 GMT

Hi,

I would need to know the possible Raid modes
(actually) and usable capacity for each mode
of a VA7100 with 4 disk of 36G.

S. Viudez.

Re: VA7100 diferent RAID modes and usable capacity

Enes Dizdarevic — Mon, 03 Dec 2001 14:06:28 GMT

Since you have 4 disks only it does not matter if your array is in RAID 1+0 or AUTORAID mode. It will always keep data in RAID 1+0 because there is no capacity gain from converting to RAID5DP. Usable capacity depends of Active Hot Spare settings:
0 disk for AHS gives you 68GB usable capacity
1 disk for AHS gives you 48.6 usable capacity
2 disk for AHS gives you 32.2 usable capacity

Re: VA7100 diferent RAID modes and usable capacity

harry d brown jr — Mon, 03 Dec 2001 21:15:13 GMT

You will find the va7100 info here:

http://www.hp.com/cposupport/prodhome/hpsurestor30307.html

live free or die
harry

Re: VA7100 diferent RAID modes and usable capacity

Sebastian Viudez Ortega — Tue, 04 Dec 2001 07:51:28 GMT

Hi Enes,

Can you say me the same
information for a
configuration of 6 disk of
36G and for other with 8
disk of 36G?

Thank you.

S. Viudez.

Re: VA7100 diferent RAID modes and usable capacity

Enes Dizdarevic — Tue, 04 Dec 2001 09:38:15 GMT

With more than 4 disks usable capacity depends of raid mode.
For 6x36 disks in RAID 1+0 you have:
0 AHS 103.8
1 AHS 85.9
2 AHS 68
For 8x36 disks in RAID 1+0 you have:
0 AHS 139.7
1 AHS 139.7
2 AHS 103.8
For 6x36 disks in AUTORAID you have:
0 AHS 132.2
1 AHS 101.2
2 AHS 68
For 8x36 disks in AUTORAID you have:
0 AHS 198.4
1 AHS 165.4
2 AHS 132.2