Areca 1880

[Anvil]

Nizzen surpassed 100.000 4K rr iops last night using the C300s, not sure of what settings he used.

(might have been the read ahead stuff, I'll ask him)

[Nizzen]

Nizzen surpassed 100.000 4K rr iops last night using the C300s, not sure of what settings he used.

(might have been the read ahead stuff, I'll ask him)

It passed 100k @ qQD and the "default" controller settings where used. HDD Read Ahead Cache: enabled
Volume Data Read Ahead: Normal
Volume Stripe Size: 4k
Tagged Command Queuing: enabled
Volume Cache Mode: Writeback

12 workers in Iometer
Align i/o : ON "4k"

[DeViTTo]

Help someone with areca 1880. I have just recieved the cables 3ware and on connecting the card up to 2 x Intel 80GB G1's in default raid 0 my results have me confused.



atto result



Previous ICH10 Intel raid 0



Every time I run atto it seems low numbers appear on some of the reads. I have set and redone the array even tried changing cables still same results inconsitency. Can anyone point me where might the problem lie. just got back in from work so probably something I missed. BTW these results are taken from OS on normal HD with win7 and drivers installed for card etc. My HD teach for the intels on ICH 10 was around 525MB across the board.

Crystal mark is better
old intel

seq = 565.7 write 158.1
512k = 368.7 write 151.2
4k = 18.74 write 121.4
4kqd32 = 240.9 write 140.6

new areca
seq = 553 write 179.9
512 = 593 write 191.9
4k = 22.98 write 130.3
4kqd32 = 225.5 write 157.2

0 fill 512 cache enabled

So why the strange atto. Long bench HDtach is very good?

hmm downloaded newer version atto results speak for themselves.



And long bench areca but short still shows 300 odd must be glitch or untrustworthy bench or cache. Looks good otherwise

[One_Hertz]

Both ATTO and HDtach are no good at measuring things. ATTO works fine only if there is no cache.

[DeViTTo]

I know the cache plays into the score, but I still think something is not quite right here is my intel score 1gb and areca 1gb so taking away the cache which on my card is only 512mb anyways. Please someone chirp in if you know why my reads on the areca at 1 gb should be so low.

Intel


Areca


Anyone?