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Can anyone answer me a question about backup drives and what throughput I should be getting... I have 3 file servers, they are as follows:
1 - 2.2Tb of storage, 2x SCSI LTO4 FH, w2k3 32bit, BE10d
2 - 1.8Tb of storage, 1x FC LTO4 in a Quantum Scalar i500, w2k3 32bit, BE12.5
3 - 1.8Tb of storage, 1x SAS LTO4 HH, w2k3 32bit, BE12.5
Now, all these servers are defrag'd regularly, not fragmented at all. The storage on servers 1 and 3 are old and a bit slow (CX300's with ATA drives, a whole shelf of disks each)
2 is running on a CX320 again, with a fair whack, I don't know the exact ammount in LUNs or speeds of disks, but this is our tier 1 storage, so it's got to be fast.
Server 3 is the only one that runs fast at backing up it's data, the other 2 are appauling. Server 2 is currently doing 690MB\Min, takes over 24hrs to back up. I've knocked it back to doing incrementals as it's just silly now. Server 1, is -ok- the backup runs until about midday, acceptable.
To me, it'd seem that the HH SAS is by far the best performing drive of them all, but the FC LTO4 should be performing, just as well, as it's got to be running at at least 2Gb\s if not 4. The physical server specs are pretty simular D or Q cored xeons, 4Gb of RAM each.
Any ideas as to what I should look into to try and get to the root cause of why these backups are being so crappy? Invest in SAS LTO4 drives instead of SCSI\FC?
1 - 2.2Tb of storage, 2x SCSI LTO4 FH, w2k3 32bit, BE10d
2 - 1.8Tb of storage, 1x FC LTO4 in a Quantum Scalar i500, w2k3 32bit, BE12.5
3 - 1.8Tb of storage, 1x SAS LTO4 HH, w2k3 32bit, BE12.5
Now, all these servers are defrag'd regularly, not fragmented at all. The storage on servers 1 and 3 are old and a bit slow (CX300's with ATA drives, a whole shelf of disks each)
2 is running on a CX320 again, with a fair whack, I don't know the exact ammount in LUNs or speeds of disks, but this is our tier 1 storage, so it's got to be fast.
Server 3 is the only one that runs fast at backing up it's data, the other 2 are appauling. Server 2 is currently doing 690MB\Min, takes over 24hrs to back up. I've knocked it back to doing incrementals as it's just silly now. Server 1, is -ok- the backup runs until about midday, acceptable.
To me, it'd seem that the HH SAS is by far the best performing drive of them all, but the FC LTO4 should be performing, just as well, as it's got to be running at at least 2Gb\s if not 4. The physical server specs are pretty simular D or Q cored xeons, 4Gb of RAM each.
Any ideas as to what I should look into to try and get to the root cause of why these backups are being so crappy? Invest in SAS LTO4 drives instead of SCSI\FC?
