May 17, 2021
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Hello,

My raid 10 drive seems to be a bit slow compared to other drives. It is a motherboard raid 10 setup (Asus z370-E motherboard). If I move a bunch of files or a fairly large folder, windows transfer box says everything has moved quickly, but the box stays up showing 0 items left to move, and it takes up to 5 minutes for it to complete.

I ran Crystal Disk Mark and the results are below compared to a single HDD I have in my system:

Raid 10:

[Read]
SEQ 1MiB (Q= 8, T= 1): 133.203 MB/s [ 127.0 IOPS] < 62509.38 us>
SEQ 1MiB (Q= 1, T= 1): 100.404 MB/s [ 95.8 IOPS] < 10434.77 us>
RND 4KiB (Q= 32, T= 1): 3.528 MB/s [ 861.3 IOPS] < 36637.00 us>
RND 4KiB (Q= 1, T= 1): 0.503 MB/s [ 122.8 IOPS] < 8126.54 us>

[Write]
SEQ 1MiB (Q= 8, T= 1): 85.350 MB/s [ 81.4 IOPS] < 96914.38 us>
SEQ 1MiB (Q= 1, T= 1): 63.378 MB/s [ 60.4 IOPS] < 14689.40 us>
RND 4KiB (Q= 32, T= 1): 0.508 MB/s [ 124.0 IOPS] <247662.84 us>
RND 4KiB (Q= 1, T= 1): 0.445 MB/s [ 108.6 IOPS] < 8820.85 us>

Profile: Default
Test: 1 GiB (x5) [D: 36% (2716/7452GiB)]
Mode: [Admin]
Time: Measure 5 sec / Interval 5 sec

Single Drive:

[Read]
SEQ 1MiB (Q= 8, T= 1): 156.119 MB/s [ 148.9 IOPS] < 53356.13 us>
SEQ 1MiB (Q= 1, T= 1): 155.691 MB/s [ 148.5 IOPS] < 6727.32 us>
RND 4KiB (Q= 32, T= 1): 0.533 MB/s [ 130.1 IOPS] <238560.37 us>
RND 4KiB (Q= 1, T= 1): 0.388 MB/s [ 94.7 IOPS] < 10529.57 us>

[Write]
SEQ 1MiB (Q= 8, T= 1): 151.201 MB/s [ 144.2 IOPS] < 55121.42 us>
SEQ 1MiB (Q= 1, T= 1): 150.582 MB/s [ 143.6 IOPS] < 6957.50 us>
RND 4KiB (Q= 32, T= 1): 1.358 MB/s [ 331.5 IOPS] < 95306.59 us>
RND 4KiB (Q= 1, T= 1): 1.328 MB/s [ 324.2 IOPS] < 3081.78 us>

Profile: Default
Test: 1 GiB (x5) [F: 3% (115/3726GiB)]
Mode: [Admin]
Time: Measure 5 sec / Interval 5 sec

for the most part the single drive looks like it out performed the raid drive. Would a raid card help with this? just not sure why it seems slower than a single drive. Thanks!
 
May 17, 2021
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RAID 10 has two write twice as much data so the 1/2 write speed is expected. The sequential read speeds will be about single drive speed. This seems pretty reasonable.
I was under the impression that because its stripped that it should write twice as fast as a single drive. Same thing with the read, everywhere I have read it should read much faster as it can read from multiple disks compared to just one.

If the speed is no difference, I might as well run as single disks, and just backup the data as its a personal PC not business sensitive.
 

kanewolf

Titan
Moderator
I was under the impression that because its stripped that it should write twice as fast as a single drive. Same thing with the read, everywhere I have read it should read much faster as it can read from multiple disks compared to just one.

If the speed is no difference, I might as well run as single disks, and just backup the data as its a personal PC not business sensitive.
There is generally no benefit to RAID for a home user. It also provides a false sense of data security. Even with RAID, backups are required for data security.
 
May 17, 2021
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There is generally no benefit to RAID for a home user. It also provides a false sense of data security. Even with RAID, backups are required for data security.
Thanks, might as well break up the Raid then. I do backup my important data, the raid was more to backup the stuff I could lose, as well as if a drive died, I could still continue working (also I just wanted to have some fun with Raid lol)
 

DSzymborski

Polypheme
Moderator
I was under the impression that because its stripped that it should write twice as fast as a single drive. Same thing with the read, everywhere I have read it should read much faster as it can read from multiple disks compared to just one.

If the speed is no difference, I might as well run as single disks, and just backup the data as its a personal PC not business sensitive.
The second paragraph is you answering your own question! RAID is pointless for >98% of consumers and when it's used as a substitute for a proper backup, it's actually counter-productive. For most home users, the only benefit will be a synthetic benchmark. As a backup, it protects against the loss of a hard drive while it does nothing to protect against corrupted files or accidentally deleted files or viruses; a proper backup plan does all of this.
 

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