RAID grrrr - Page 2

jmke · 5th September 2006, 22:56

4-way RAID 0 "should" be faster, but best to do a quick compare maybe with the E; set them up for RAID 0 with 2 disks vs 3 disks vs 4 disks vs 1 disk (no raid)

also, use different apps to test (sisoft sandra also for example). also if you do a quick format, remember that the OS will format the drive sector first time there is data written to it... so performance is not very correct with the extra formatting overhead. for the read speed this can matter also.

with HDTach you can do write tests (in the reg version) to unformatted volumes, try that.

READ speed with RAID-0 is not very very fast compared to single drive AFAIk, it's the write speed which is much better.

jmke · 5th September 2006, 23:32

read speed for the first RAID-0 2 disk array is great, that the Intel raid one right?

the second array on the SiliconImage is faster than a single SP2504C which only scores about ~57Mb/s in single drive mode; so you do gain a bit here at ~76Mb/s

jmke · 5th November 2006, 10:43

that's quite an increase indeed, check also that average read speed, impressive!

easypanic · 6th November 2006, 07:40

what mobo is that koensa?

jmke · 6th November 2006, 17:59

how is your CPU cooled?

11th January 2007, 16:30

If you mirror, no data will be split. Mirroring can only be done using 2 drives. Striping splits the data and puts it on 2 drives.
The only (common) RAID arrays that support 3 drivers is RAID5 and JBOD.

jmke · 11th January 2007, 16:48

I would never recommend RAID 0 unless you are 100% sure that loosing any of the data on that array is "okay" and "acceptable".

easypanic · 11th January 2007, 16:55

Only few, expensive RAID controllers have "array expansion". This is mostly in a RAID 5 array....

easypanic · 11th January 2007, 17:20

didn't you backup on another disk????

jmke · 11th January 2007, 17:47

I try to keep 3 different backup copies of important data, at least

5th September 2006, 22:56	#11
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,022	4-way RAID 0 "should" be faster, but best to do a quick compare maybe with the E; set them up for RAID 0 with 2 disks vs 3 disks vs 4 disks vs 1 disk (no raid) also, use different apps to test (sisoft sandra also for example). also if you do a quick format, remember that the OS will format the drive sector first time there is data written to it... so performance is not very correct with the extra formatting overhead. for the read speed this can matter also. with HDTach you can do write tests (in the reg version) to unformatted volumes, try that. READ speed with RAID-0 is not very very fast compared to single drive AFAIk, it's the write speed which is much better. __________________

5th September 2006, 23:32	#12
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,022	read speed for the first RAID-0 2 disk array is great, that the Intel raid one right? the second array on the SiliconImage is faster than a single SP2504C which only scores about ~57Mb/s in single drive mode; so you do gain a bit here at ~76Mb/s __________________

5th November 2006, 10:43	#13
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,022	that's quite an increase indeed, check also that average read speed, impressive! __________________

6th November 2006, 07:40	#14
easypanic Member Join Date: Mar 2003 Posts: 1,823	what mobo is that koensa? __________________ \|^^^^^^^^^^^^^^^^^^\\|\|____ \|....The BEER TRUCK.... \|\|\|\|'""\|""°\_,__ \|___Just for You___l\|\|__\|__\|___\|) _____\| \|(@)(@)""""""""""""\|(@)(@)**\|(@)\|

6th November 2006, 17:59	#15
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,022	how is your CPU cooled? __________________

11th January 2007, 16:30	#16
wutske Posts: n/a	If you mirror, no data will be split. Mirroring can only be done using 2 drives. Striping splits the data and puts it on 2 drives. The only (common) RAID arrays that support 3 drivers is RAID5 and JBOD.

11th January 2007, 16:48	#17
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,022	I would never recommend RAID 0 unless you are 100% sure that loosing any of the data on that array is "okay" and "acceptable". __________________

11th January 2007, 16:55	#18
easypanic Member Join Date: Mar 2003 Posts: 1,823	Only few, expensive RAID controllers have "array expansion". This is mostly in a RAID 5 array.... __________________ \|^^^^^^^^^^^^^^^^^^\\|\|____ \|....The BEER TRUCK.... \|\|\|\|'""\|""°\_,__ \|___Just for You___l\|\|__\|__\|___\|) _____\| \|(@)(@)""""""""""""\|(@)(@)**\|(@)\|

11th January 2007, 17:20	#19
easypanic Member Join Date: Mar 2003 Posts: 1,823	didn't you backup on another disk???? __________________ \|^^^^^^^^^^^^^^^^^^\\|\|____ \|....The BEER TRUCK.... \|\|\|\|'""\|""°\_,__ \|___Just for You___l\|\|__\|__\|___\|) _____\| \|(@)(@)""""""""""""\|(@)(@)**\|(@)\|

11th January 2007, 17:47	#20
jmke Madshrimp Join Date: May 2002 Location: 7090/Belgium Posts: 79,022	I try to keep 3 different backup copies of important data, at least __________________

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