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SATA II and SAS RAID CARD ROUNDUP
RAID-6 Summary
RAID-6 is a newly popularized RAID level similar
to RAID-5, but the difference being two parity
blocks are involved instead of just one. This
increases throughput by reducing individual disk
bandwidth, but reduces the overall data storage
capacity. All the controllers except the
HPT-1820A supports RAID-6.
HD Tach RW v3.0.1.0, 8MB Zones: Hardware RAID-6,
Smallest stripe
|
RAID CARD |
STRIPE SIZE |
BURST SPEED |
AVE. READ SPEED |
AVE. WRITE SPEED |
RANDOM ACCESS TIME |
| Adaptec ASR-31605 |
WNR |
WNR |
WNR |
WNR |
WNR |
| Areca ARC-1220 |
4k |
666.1 MB/s |
226.4 MB/s |
WNR |
11.4 ms |
| Areca ARC-1261ML |
4k |
1098.6 MB/s |
361.6 MB/s |
WNR |
11.3 ms |
| Areca ARC-1680 |
4k |
1054.3 MB/s |
355.2 MB/s |
589.0 MB/s |
11.3 ms |
| LSI MegaRAID 8708ELP |
8k |
379.0 MB/s |
218.2 MB/s |
7.5 MB/s |
11.5 ms |
| LSI MegaRAID 8888ELP |
8k |
398.5 MB/s |
217.4 MB/s |
7.6 MB/s |
11.6 ms |
| Promise EX16300 |
32k |
227.6 MB/s |
131.2 MB/s |
54.8 MB/s |
11.8 ms |
LSI greatly suffered here in the writes.
This might be attributed to the lack of
initialization. However, none of the other
arrays /cards were initialized either because of
time constraints. As for the ASR-31605, it did
not like this test either. Areca still on top.
HD Tach RW v3.0.1.0, 32MB Zones: Hardware RAID-6,
Smallest stripe
|
RAID CARD |
STRIPE SIZE |
BURST SPEED |
AVE. READ SPEED |
AVE. WRITE SPEED |
RANDOM ACCESS TIME |
| Adaptec ASR-31605 |
WNR |
WNR |
WNR |
WNR |
WNR |
| Areca ARC-1220 |
4k |
678.9 MB/s |
338.6 MB/s |
WNR |
11.3 ms |
| Areca ARC-1261ML |
4k |
1094.6 MB/s |
448.8 MB/s |
WNR |
11.6 ms |
| Areca ARC-1680 |
4k |
1048.8 MB/s |
433.1 MB/s |
524.6 MB/s |
11.3 ms |
| LSI MegaRAID 8708ELP |
8k |
402.7 MB/s |
237.6 MB/s |
7.9 MB/s |
11.3 ms |
| LSI MegaRAID 8888ELP |
8k |
374.8 MB/s |
237.7 MB/s |
7.6 MB/s |
11.3 ms |
| Promise EX16300 |
32k |
233.9 MB/s |
132.5 MB/s |
84.5 MB/s |
11.8 ms |
Same situation here. Some cards show
minimal improvement with the larger zone size test,
but the EX16300 jumped the most in the write speeds.
ATTO Disk Benchmark: Hardware RAID-6, Smallest
stripe
Write Speed, KB/s
Read Speed, KB/s
|
Length |
RAID Card
Stripe size |
ASR-31605
16k |
ARC-1220
4k |
ARC-1261ML
4k |
ARC-1680
4k |
8708ELP
8k |
8888ELP
8k |
EX16300
32k |
|
0.5 |
21769 |
32461 |
34194 |
34066 |
3702 |
2473 |
11687 |
|
24841 |
33229 |
34578 |
35090 |
11559 |
10436 |
11432 |
|
1.0 |
44647 |
65632 |
67108 |
67876 |
4067 |
4005 |
21480 |
|
47831 |
66656 |
69668 |
70180 |
29699 |
29517 |
21842 |
|
2.0 |
82153 |
127365 |
134729 |
135753 |
6557 |
6859 |
37370 |
|
56987 |
134021 |
137801 |
140873 |
61127 |
58645 |
39698 |
|
4.0 |
134021 |
251461 |
267214 |
267214 |
6561 |
7447 |
58720 |
|
92078 |
257802 |
271507 |
272531 |
120211 |
116951 |
67108 |
|
8.0 |
209518 |
381583 |
528285 |
534626 |
15904 |
20821 |
87847 |
|
143577 |
480198 |
530530 |
547307 |
203893 |
202867 |
97444 |
|
16.0 |
275937 |
401452 |
1031602 |
1069449 |
33616 |
33767 |
103722 |
|
196542 |
727792 |
993951 |
1010728 |
292672 |
287155 |
94020 |
|
32.0 |
246558 |
410845 |
334511 |
335347 |
57517 |
52962 |
106983 |
|
241263 |
794734 |
570228 |
578617 |
359614 |
330391 |
152332 |
|
64.0 |
380173 |
416308 |
360710 |
369098 |
102396 |
62282 |
113195 |
|
275567 |
820033 |
595591 |
612368 |
391329 |
360710 |
233132 |
|
128.0 |
395727 |
419430 |
377487 |
385875 |
107440 |
67862 |
117147 |
|
291415 |
832616 |
603979 |
612368 |
388438 |
379239 |
241458 |
|
256.0 |
33222 |
419430 |
376545 |
385875 |
97731 |
64683 |
123969 |
|
298999 |
830472 |
603979 |
612368 |
393281 |
384913 |
292869 |
|
512.0 |
382568 |
420460 |
384913 |
385875 |
122164 |
70393 |
141779 |
|
305791 |
830472 |
610841 |
612368 |
393281 |
384913 |
328160 |
|
1024.0 |
390360 |
420460 |
385875 |
394264 |
111054 |
57288 |
123664 |
|
313284 |
832616 |
610841 |
612368 |
395727 |
390360 |
338850 |
Areca is now truly showing its superior engine,
besting all cards in all tests. Like previous
benchmarks, the ARC-1220 outperforms all in the
larger data sizes, whereas the smaller ones are
dominated by the ARC-1680 and ARC-1261ML.
HD Tach RW v3.0.1.0, 8MB Zones: Hardware RAID-6,
Largest stripe
|
RAID CARD |
STRIPE SIZE |
BURST SPEED |
AVE. READ SPEED |
AVE. WRITE SPEED |
RANDOM ACCESS TIME |
| Adaptec ASR-31605 |
WNR |
WNR |
WNR |
WNR |
WNR |
| Areca ARC-1220 |
128k |
683.6 MB/s |
255.7 MB/s |
WNR |
11.6 ms |
| Areca ARC-1261ML |
128k |
1071.8 MB/s |
421.6 MB/s |
WNR |
11.5 ms |
| Areca ARC-1680 |
128k |
1078.3 MB/s |
421.8 MB/s |
596.2 MB/s |
11.3 ms |
| LSI MegaRAID 8708ELP |
1024k |
210.3 MB/s |
57.9 MB/s |
19.2 MB/s |
12.4 ms |
| LSI MegaRAID 8888ELP |
1024k |
201.7 MB/s |
58.6 MB/s |
21.4 MB/s |
11.8 ms |
| Promise EX16300 |
128k |
211.3 MB/s |
119.2 MB/s |
63.4 MB/s |
11.8 ms |
HD Tach RW v3.0.1.0, 32MB Zones: Hardware RAID-6,
Largest stripe
|
RAID CARD |
STRIPE SIZE |
BURST SPEED |
AVE. READ SPEED |
AVE. WRITE SPEED |
RANDOM ACCESS TIME |
| Adaptec ASR-31605 |
WNR |
WNR |
WNR |
WNR |
WNR |
| Areca ARC-1220 |
128k |
673.9 MB/s |
362.5 MB/s |
WNR |
11.0 ms |
| Areca ARC-1261ML |
128k |
1045.8 MB/s |
428.1 MB/s |
WNR |
11.4 ms |
| Areca ARC-1680 |
128k |
1080.2 MB/s |
374.4 MB/s |
544.1 MB/s |
11.4 ms |
| LSI MegaRAID 8708ELP |
1024k |
241.2 MB/s |
157.4 MB/s |
18.9 MB/s |
11.4 ms |
| LSI MegaRAID 8888ELP |
1024k |
242.5 MB/s |
146.8 MB/s |
20.9 MB/s |
11.5 ms |
| Promise EX16300 |
128k |
216.0 MB/s |
119.2 MB/s |
111.6 MB/s |
12.0 ms |
Sluggish LSI performance
again, while Areca burns through with staggering
numbers.
ATTO Disk Benchmark: Hardware RAID-6, Largest
stripe
Write Speed, KB/s
Read Speed, KB/s
|
Length |
RAID Card
Stripe size |
ASR-31605
1024k |
ARC-1220
128k |
ARC-1261ML
128k |
ARC-1680
128k |
8708ELP
1024k |
8888ELP
1024k |
EX16300
128k |
|
0.5 |
22537 |
32589 |
32333 |
34706 |
4225 |
4227 |
9772 |
|
24713 |
33101 |
32973 |
35858 |
10027 |
8644 |
9850 |
|
1.0 |
44247 |
65120 |
64352 |
69156 |
7603 |
8454 |
19033 |
|
43735 |
66400 |
65888 |
71972 |
18430 |
17545 |
22608 |
|
2.0 |
73580 |
127365 |
127365 |
138825 |
11975 |
13115 |
33812 |
|
92786 |
133509 |
131461 |
144142 |
33554 |
32520 |
44679 |
|
4.0 |
132997 |
252682 |
250437 |
275603 |
15866 |
18638 |
59744 |
|
160007 |
255754 |
255754 |
278872 |
54291 |
52249 |
79593 |
|
8.0 |
211763 |
351583 |
501071 |
553451 |
20564 |
20873 |
94087 |
|
260046 |
477954 |
501071 |
561840 |
83886 |
79650 |
132694 |
|
16.0 |
269833 |
401452 |
964493 |
33357 |
22750 |
25612 |
117243 |
|
355528 |
717127 |
939327 |
1031602 |
99471 |
99471 |
99718 |
|
32.0 |
305597 |
409820 |
334511 |
335347 |
24124 |
26214 |
167157 |
|
489832 |
780140 |
528285 |
587005 |
118242 |
114663 |
161518 |
|
64.0 |
374677 |
416308 |
360710 |
369098 |
21648 |
22469 |
183175 |
|
627576 |
811665 |
587202 |
610841 |
171864 |
150618 |
236184 |
|
128.0 |
415277 |
419430 |
376545 |
385875 |
21883 |
22774 |
185072 |
|
702885 |
820033 |
595591 |
612368 |
199827 |
192456 |
288551 |
|
256.0 |
481722 |
418384 |
376545 |
385875 |
21694 |
25960 |
188692 |
|
746586 |
820033 |
595591 |
612368 |
253704 |
247939 |
346261 |
|
512.0 |
514944 |
418384 |
377487 |
385875 |
26843 |
28864 |
193119 |
|
840942 |
820033 |
602473 |
612368 |
318767 |
317972 |
441286 |
|
1024.0 |
498333 |
420460 |
384913 |
393281 |
28926 |
31775 |
196416 |
|
849268 |
820033 |
602473 |
619208 |
377384 |
410200 |
443487 |
Like before, Adaptec
manages to finish first in the largest data size
tests, while Areca maintains dominance in the rest.
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