Addonics Controller – 2 Disk RAID 0
Let’s up the ante and see what the Addonics controller can do with two disks.
Theoretically a perfect RAID 0 set would provide double the throughput of a single disk, and depending on the number of requests outstanding, anywhere from the same latency to half that of the single disk. Unfortunately, perfection is too lofty a goal.
Let’s see what ATTO makes of our two disk RAID 0 set:
Throughput for smaller blocks is unchanged, but for larger blocks is up by nearly 100%, exactly as we would hope. It seems the smaller requests are being satisfied by only 1 disk and the larger requests by both. The stripe size is unknown but from the results above it seems to be 8KB (4KB per disk) or 16KB (8KB per disk).
HDTach shows a similar result. Compared to the single disk environment, throughput is up across the board, but the latency is almost unchanged.
HDTune shows us two key points. Firstly, random IO and latency are not improved with the RAID 0 set, indicating perhaps that the RAID controller does not control the disks independently.
Sequential IO is the big winner.
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|70.114.239.xxx |2009-12-30 06:46:59 outcast2k - product review gaps?good start on covering some of the basics. some other detais that would be good to know:
1) how long does a RAID rebuild take?
2) how do you tell how far a rebuild has left?
3) how do you tell which disk failed?
4) does the software UI handle 2+ HDM-XA's in the system?
5) how do you recover the RAID if the HDM-XA itself has failed and needs to be replaced?
6) what's the biggest sized drives supported? 2TB?
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|219.90.134.xxx |2010-03-07 23:17:32 TERRABYTEONE - ?? 3132 pciex1 card max output is 190mb/seciv tested this.. etc..
sil 3132 pci-e x1 card )(addtronics one) or jmb 363 or highpoint 4 port x1 2300 raid card.
max oot put is 190mb sec total.. and if using 2 ports its 95mb/sec..
tested this using 4x volir wd 300g hdd
(they get each 109mb/sec)
so if using both e-sata ports.. transfer maxes out at 190mb.sec..
if using 4 hdd in raid 0 etc... max output for 4x vr 300 on intel on-board raid (x48 chipset) 500+mb/sec..
on sil using this product is.. 90mb/sec.
als tryed 4x 1.5 tb 7200.11 hdd..max out at 90mb/sec
also tryed raid 5.. 90mb/sec.
2tb hdd supported. but hardware or nonhardware raid the sil raid gear does not support partitions bigger than 2tb.(old design)
to get 6 tb hdd spac out of in i raid 0 (4x 1.5tb)
i hd to make 4 partitions .. the software is limited in what size to make. it..it was tricky.. i had to make partitin/volumns 2+ then delet and recreat smaller ones. in aparticular order.
they need to update thar raid cards. (chan...
Thanks for the great write up!