Finally got them!
Hi all guys,
as i promised some time ago,
JDany3D said:
OK, i'll share my benches as soon as the whole workstation is up and running, it's a promise!
after most nights spent looking for informations and reviews i'm here to share with you the results of my researches.
The Hitachi (HDT725050VLA360) it's a good drive, a little bit better than Samsung HD501J by some points of view but i wasn't completely satisfied about results achieved in multithreading.
They got 23 MB/s with 4 threads accessing them simultaneously.
Not so bad as Perps Seagate 500 GB (7 MB/s) but no so good as Western Digital WD5000YS (40 MB/s).
Looking for Samsung drives i found nothing on multithreaded test so, I decided it would be too risky buy them and take a test on my own.
So, after deleting Seagate, Hitachi and Samsung from the shopping list, the only way to go is to WD.
I was nearly buying WD5000YS RE2 (raid edition) but there was still something not convincing me too much: the platters density, 125 GB x 4 platters, giving them an internal transfer rate of 70 MB/s.
Not too bad but no so good, considering their price and 78 MB/s of hitachi and 86 MB/s of Samsung HD501J.
Spending some other time on Western Digital site, i finally found the drives i want:
WD5000ABYS RE
They are still a raid edition and are very similar to WD5000YS RE2.
The main difference i'have found was internal transfer rate: 85 MB/s due to 3 x 166 high density platters!
Got them!
I paid 612 euros (4 x 153) but i think they are the best choice for raid systems, or a least, the best choice for me!
Last but not least, 5 years warranty.
I configured them in that way (matrix raid):
Volume Raid 0 --> 64 GB (16 x 4). Stripe size 128Kb.
Volume Raid 5 --> 1452 GB (484 x (4-1)). Stripe size 128Kb.
And finally some bench for you...
Single Hitachi HDS725050KLA360: i bought it to take some test on the system (i'll use it as storage, temporary backup and maybe as temp/scratch disk for Audio/Video onto the first fast zone of the disk. I'll see....)
Probably the high density drive HDT725050VLA360 would achieved better results.
RAID 0 (O.Ss, temp and swap)
RAID 5 (projects data, video capture, secure working space)
Results seem to be very good for raid 0 and good for raid 5.
Raid 0 has a nice STR on the whole 64 Gb volume as it expected to be, with an average access time between 7.9 and 8.2 ms (like a RAPTOR!!!)
The raid 5 worked very well up to 50-60% of the volume, after that, there is a slight steep speed drop.
As soon as i understand how to use IOMeter, I'll do some multithreaded test to see how those drives behave under heavy workload.
I would also take a writing test on raid 5 in order to see CPU load (it could be a critical point without having a dedicated raid card).
Of course, i'll post'em all here for you....
If you have some advice on how to use IOMeter, i'll appreciate it very much.
What do you think about my results?
Bad, good?
I'm waiting for your comments.
Have a nice day.
Bye
JDany3D
PS: here below my final rig...