| Issue 30: | Disk types, cost and performance | |
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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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Aug 26, 2009
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
ptiggerdine, Appreciate you help. And thanks a lot for the information. I shall keep in mind the same.
Aug 27, 2009
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
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
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 |