Issue 30: Disk types, cost and performance
Project Member Reported by sandeepksinha, Jan 12, 2009
Hi Guys,

Let start will all the disk types and its performance and price metrics.

http://www.storagesearch.com/bitmicro-art3.html

We should discuss here about,
1. RAM disks
2. SSD
3. Rotating Disks
4. Tapes

Please share your knowledge here....

Jan 14, 2009
Project Member #1 sandeepksinha
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Cc: -fscops -sandeepksinha -sandeepksinha -checkout.vineet -imreckless -rohitvashist2kk3 -postrishi -bharati.alatgi
Aug 26, 2009
#3 ptiggerd...@gmail.com
Hi,

I have no coding skills to mention, but I'm interested in helping with the
documentation and testing if that helps.

I would think that Rotating disk might need to be spilt into a couple categories like
SCSI and SATA as there is still quite a difference in cost.

The costs here are not be taken as word.

Rotating Disk.
SCSI disk assuming you look purely at disk cost (minus - power and chassis) is circa
2.50/Gb
SAS 15K 147Gb disk assuming you look purely at disk cost (minus - power and chassis)
is circa $3/Gb

Tapes:
T10000 Tape (minus power and drive itself) is $1/gb

Hope this helps.

Aug 27, 2009
Project Member #4 sandeepksinha
ptiggerdine,
Appreciate you help. And thanks a lot for the information. I shall keep in mind the same.
Aug 27, 2009
Project Member #5 greg.fre...@gmail.com
We should get this moved to a sourceforge page or standalone doc if we want to track it.

I priced some iSCSI arrays at the start of the summer.  They used 1TB sata drives
internally.  For raid 5 or 6, they came in at about $1000/TB.  I believe NetApp would
be in that range or higher as well.

Aug 27, 2009
Project Member #6 greg.fre...@gmail.com
Oh and I forgot to say LTO-4 media is about $50.  That is 800GB / 1600 GB officially.

The few LTO-4 tapes I worked with that were full had about 1.2 TB on them.  So $0.05
/ GB.  LTO is the preferred Enterprise backup tool today.

SATA is closer to $0.10 / GB today.  The small ratio (2:1) is another reason I don't
have any desire to attack tape.
Aug 28, 2009
#7 ptiggerd...@gmail.com
Greg,

Agreed. LTO for archiving is the standard. T10000 thou are by far quicker in terms of
tape performance and I'm sure we can all agree that for a HSM solution speed does
count when you're pulling a file transparently from a tape solution.

Sourceforge idea sounds great.

Regards,

Peter Tiggerdine