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#1 (permalink) |
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New Member
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Given a set of Seagate hard disks, 7200.9 ST-3250624AS, direct-attached to a server, what is the theoretical effective bandwidth of each of the following RAID organizations?
1)4-disk concatenated JBOD 2)4-disk RAID0 3)4-disk RAID1 4)4-disk RAID5 5)8-disk RAID5 6)18-disk RAID50, comprised of three 6-disk RAID5 i'd appreciate it if anyone can help me out. |
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#2 (permalink) |
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Moderator
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For striped arrays, this is assuming ideal conditions (aka fake)
1. Single disk bandwidth. 2. 4x bandwidth of a single disk. 3. Single disk bandwidth 4. A 4 disk RAID5 of raptors scored ~140MB/s (h2benchw) so I would say some 7200.9s would be a bit slower 120MB/s maybe. 5. Ballpark 200MB/s (again raptors got 235 in h2benchw) 6. Hell if I know. If I had to guess, I would say it would be comparable to to 6 disk raid 5
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#4 (permalink) |
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Moderator
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No a single disk's sustained bandwidth is give or take 55MB/s.
__________________
You know what the chain of command is? It's the chain I go get and beat you with 'til ya understand who's in ruttin' command here. I must plug a couple comics because they are good :D: www.ctrlaltdel-online.com www.userfriendly.org |
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