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I have raid5 and 6 HD one HD size is 1TB. In the Nagios monitoring most of the time we saw error for Disc IO usage critical we set 3000 as a warning and 3500 as a critical error in nagios plug-in for this Disc IO usage. Can anyone help our what is the standard IO for RAID5.

megasasctl

| a0      | PERC H730 Mini | encl:1 ldrv:1 | batt:FAULT, low voltage 
|---------|----------------|---------------|-------------------------
| a0d0    | 5586GiB RAID 5 | 1x6           | optimal                 
| a0e32s0 | 1117GiB        | a0d0          | online                  
| a0e32s1 | 1117GiB        | a0d0          | online                  
| a0e32s2 | 1117GiB        | a0d0          | online                  
| a0e32s3 | 1117GiB        | a0d0          | online                  
| a0e32s4 | 1117GiB        | a0d0          | online                 
| a0e32s5 | 1117GiB        | a0d0          | online

iostat -dx

Linux 3.16.0-59-generic (as03) 26/10/16 _x86_64_ (32 CPU)

| Device: | rrqm/s | wrqm/s  | r/s           | w/s             | rkB/s | wkB/s  | avgrq-sz | avgqu-sz | await  | r_await | w_await | svctm | %util |
|---------|--------|---------|---------------|-----------------|-------|--------|----------|----------|--------|---------|---------|-------|-------|
| sda     | 0.41   | 1099.86 | 14.29 2658.28 | 869.90 16850.50 | 13.26 | 0.15   | 0.05     | 1.84     | 0.05   | 0.03    | 9.21    |       |       |
| sdc     | 0.00   | 0.00    | 0.00          | 0.00            | 0.00  | 0.00   | 8.00     | 0.00     | 6.68   | 6.68    | 0.00    | 6.68  | 0.00  |
| sdb     | 0.00   | 0.00    | 0.03          | 0.69            | 0.12  | 335.12 | 927.77   | 0.14     | 188.05 | 11.65   | 195.94  | 4.44  | 0.32  |
| dm-0    | 0.00   | 0.07    | 0.03          | 0.68            | 0.12  | 335.12 | 938.43   | 0.33     | 465.86 | 21.56   | 485.75  | 4.50  | 0.32  |
Badal Singh Dudy
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    There's no standard, you benchmark **your array** to determine max values of the performance counters you want to monitor and derive reasonable thresholds from there. – HBruijn Nov 06 '16 at 09:39

1 Answers1

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While there is no "standard" IOPS values for any array, please pay attention to your battery: according to megasasctl output, your batter is failed (batt:FAULT, low voltage) and this will severely affect RAID5 performance.

shodanshok
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