Where to find specs

[Henrik Bruun]

I am looking after specs on 500 GB FATA disk.

I seem to have a IO problem with a VRAID, with a small number of drives.

But i wood like to find specs on varius disk.

Right now i am looking for 500 GB FATA disk.

[raadek]

You can find some data in this pdf:
http://h71028.www7.hp.com/ERC/downloads/5982-7353EN.pdf

I couldn't find 500GB spec per se, only 250GB (which should be similar though):
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c00357880〈=en&cc=us&taskId=101&prodSeriesId=352286&prodTypeId=12169

Your problem might be reflected, however, in this restriction:
"There is a minimum order requirement, with the first installation of FATA add-on drives on an EVA, a minimum of 8 FATA drives are required to create the new NearOnline disk group."

Rgds.

[Henrik Bruun]

Fine doc, but i am looking for performance data on the disks, to compare them. I think they are difficult to find. It wood be nice with a matrix, with all the disk.

Some thing like.

http://www.maxtor.com/portal/site/Maxtor/menuitem.6adb6b8313633595062e6be791346068/?channelpath=/en_us/Products/Enterprise%20Storage

and press "Compare these products"

and ofcause with all data.

[Andrzej Kowalik]

For EVA arrays, if you have more disks you have graetest I/O performance.
Look at disks specs, and note "Average Seek Read/Write" parameter. It's about 4-5 msec.
Then if you devide 1000/"Average Seek Read/Write" you've got avarage I/O per second for that drive.
If you multiply calculated value with nuber of drives - you have I/O performance for your EVA configuration.
Of course it is not strictly such value - +/- 10% you must have in mind for virtualization, caching, etc

regards,
Andrzej Kowalik