This post is more than 5 years old
103 Posts
0
823
Drive Performance Comparison
Hello all,
I have a couple of questions. What performance gain/loss by going with 300GB 15K drives vs 146GB 15K drives? For example, a 4+4 300GB drives vs a 4+4 146GB.
What performance loss would we see by going from 7+7 72GB SAS drive (PowerVault MD1000) to a 4+4 146GB FC on a Clariion? I know more spindles the better, but I wanted to see if this is the same for a FC Clarrion.
thanks.
I have a couple of questions. What performance gain/loss by going with 300GB 15K drives vs 146GB 15K drives? For example, a 4+4 300GB drives vs a 4+4 146GB.
What performance loss would we see by going from 7+7 72GB SAS drive (PowerVault MD1000) to a 4+4 146GB FC on a Clariion? I know more spindles the better, but I wanted to see if this is the same for a FC Clarrion.
thanks.
RRR
5.7K Posts
0
June 12th, 2008 03:00
However: since the 300GB is obviously bigger than a 146GB spindel, there can be more LUN's on a RG containing 300GB spindels and therefor more random I/O's can take place. The IOps per GB is lower on the 300GB's.
But suppose you have a (1) 400GB LUN residing on a RAID10 (3+3) made out of 146GB spindels and you migrate that to an 800GB LUN resiging on a RAID10 (3+3) made out of 300GB spindels, you end up with simply a bigger LUN with the same overall performance for the whole LUN. If your application doesn't change or doesn't request more performance, you're ok.
hemanand
10 Posts
1
June 12th, 2008 01:00