RAID-10 more disk platters the better?

It's not so hard to measure this yourself. Just try several configurations
and any disk benchmark software will show throughput increases when
adding more spindles.

At a certain point, you will hit other bottlenecks, and adding more
disks won't
help. In older systems, the parallel SCSI bus often meant using more than
four disks for a single array was useless. On a SAN system I recently
configured,
20 SATA disks was the max. With SSD's on a LSI Raid controller, I
measered 8 disks
to be the max. I would think more than 8 SAS 15kRPM disks in a single array
will not help either.

Splitting disks across multiple arrays will decrease your access times,
which is
very important for databases. So ideally you would have multiple
RAID-10 arrays
to have both good throughput as well as fast access times.

Pim

On 21-2-2011 7:40, randyduly wrote:
> Does anybody have any documentation either from Epicor or else where to prove why RAID 10 with more disk platters is better for Vantage 8 or Epicor 9. I am trying to make an arguement for getting a different server with RAID-10 and more disks.
>
Does anybody have any documentation either from Epicor or else where to prove why RAID 10 with more disk platters is better for Vantage 8 or Epicor 9. I am trying to make an arguement for getting a different server with RAID-10 and more disks.

At one time I saw a document from Epicor on this issue but can't find it anymore.

You can either post here or email me offline at randy.duly@....




Thanks in advance.
Disk Drive Tuning a la Epicor: https://epicweb.epicor.com/Education/OnlineHelpFeatureSummary/Epicor%209/9.04.506C/9.04.506C%20Help/snm_enu.htm#concepts-techref/techrefPerfTuneProgress_DiskDriveTuning.html

Basically, more spindles = more heads = greater ability to read/write data = happier people.

--- In vantage@yahoogroups.com, "randyduly" <randy.duly@...> wrote:
>
> Does anybody have any documentation either from Epicor or else where to prove why RAID 10 with more disk platters is better for Vantage 8 or Epicor 9. I am trying to make an arguement for getting a different server with RAID-10 and more disks.
>
> At one time I saw a document from Epicor on this issue but can't find it anymore.
>
> You can either post here or email me offline at randy.duly@...
>
>
>
>
> Thanks in advance.
>