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Hard Disk Speed

Tags:
  • Hard Drives
  • NAS / RAID
  • Servers
  • Storage
Last response: in Storage
June 26, 2011 2:24:38 AM

We built a new server but i think we may be not getting good hard disk speeds.

Our server has 2 drives...

Drive C has 2 hard disks configured in RAID 1. both disks are 15K SCSI.

Below are the speeds i am getting on Drive C

Sequential Read: 130 MB per second
Sequential Write: 120 MB per second
Random Access: 13 MB per second


Drive D has 4 146 GB SCSI hard disks configured in RAID 10

Sequential Read: 150 MB per second
Sequential Write: 140 MB per second
Random Access: 15 MB per second


Could you please let me know if these speeds are enough?

We have 2 quad core processors on the machine with 32 GM DDR3 RAM.



Thank You

Kashif

More about : hard disk speed

a c 459 G Storage
June 26, 2011 3:15:47 AM

The speed will be dependent on the data density, ie GB per platter.

What are the model numbers of your drives?

Could we see a benchmark graph, eg one produced by HD Tune?
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June 26, 2011 3:44:58 AM





I am sorry but i do not have the model of the drives as hosting company has every thing. I ran the HD Tune and have attached the images of the results.

Please help

Thank You
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a c 415 G Storage
June 26, 2011 4:22:40 AM

Those are perfectly decent speeds for hard drives - whether or not they're "enough" depends on your workload.
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June 26, 2011 5:53:50 PM

4 disks in Raid-10 should deliver about twice the individual contiguous throughput, so this one isn't good.
The Raid-1 is all right, from your measures.
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June 26, 2011 6:08:20 PM

Thanks for the reply pointervoid

We have another server configured in RAID 1 that easily gives 200 MB/second speeds... meaning faster than the 4 disk RAID 10.

Could you plz suggest what could be the reason that RAID 10 configuration is actually slower than the RAID 1 configuration?

Is it because of the RAID cards? or something else?

Any ideas will be appreciated.

Thank You

Kashif Idrees
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