WD20AERS Read/Write speed?

I had been reading a lot from this drive, I have a server with 6 of this drives, no issue yet, just wondering what is the read/write speed for this drives?

  The manual just say 110MB.

 I run this on Linux Centos 5.5 x64.

 Running different benchmark tools I have this:

basic:

hdparm -Tt /dev/sdf && hdparm -Tt /dev/sdf && hdparm -Tt /dev/sdf

/dev/sdf:
 Timing cached reads:   22752 MB in  1.99 seconds = 11426.02 MB/sec
 Timing buffered disk reads:  344 MB in  3.02 seconds = 114.09 MB/sec

/dev/sdf:
 Timing cached reads:   22752 MB in  1.99 seconds = 11424.32 MB/sec
 Timing buffered disk reads:  352 MB in  3.01 seconds = 117.11 MB/sec

/dev/sdf:
 Timing cached reads:   22736 MB in  1.99 seconds = 11416.38 MB/sec
 Timing buffered disk reads:  352 MB in  3.01 seconds = 116.77 MB/sec

dd if=/dev/zero of=test1G bs=1M count=1024
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 7.11358 seconds, 151 MB/s
[root@mbx-xenserver files]# dd if=/dev/zero of=test2G bs=1M count=2048
2048+0 records in
2048+0 records out
2147483648 bytes (2.1 GB) copied, 19.2378 seconds, 112 MB/s
[root@mbx-xenserver files]# dd if=/dev/zero of=test4G bs=1M count=4096
4096+0 records in
4096+0 records out
4294967296 bytes (4.3 GB) copied, 47.9883 seconds, 89.5 MB/s
[root@mbx-xenserver files]# dd if=/dev/zero of=test8G bs=1M count=8192
8192+0 records in
8192+0 records out
8589934592 bytes (8.6 GB) copied, 97.6511 seconds, 88.0 MB/s

bonnie -s 2048 -v 3 -d ./ && bonnie -s 2048 -v 3 -d ./

Bonnie 1.4: File ‘.//Bonnie.7726’, size: 2147483648, volumes: 3
Writing with putc()…         done:  77912 kB/s  93.3 %CPU
Rewriting…                   done:  45757 kB/s   1.0 %CPU
Writing intelligently…       done:  86499 kB/s   7.9 %CPU
Reading with getc()…         done:  76649 kB/s  88.5 %CPU
Reading intelligently…       done: 120332 kB/s   0.3 %CPU
Seek numbers calculated on first volume only
Seeker 1…Seeker 2…Seeker 3…start 'em…done…done…done…
              —Sequential Output (nosync)— ---Sequential Input-- --Rnd Seek-
              -Per Char- --Block— -Rewrite-- -Per Char- --Block— --04k (03)-
Machine    MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU   /sec %CPU
mbx-xe 3*2048 77912 93.3 86499  7.9 45757  1.0 76649 88.5120332  0.3  102.7  0.1
Bonnie 1.4: File ‘.//Bonnie.7811’, size: 2147483648, volumes: 3
Writing with putc()…         done:  77290 kB/s  92.9 %CPU
Rewriting…                   done:  46068 kB/s   1.1 %CPU
Writing intelligently…       done:  87286 kB/s   7.8 %CPU
Reading with getc()…         done:  73689 kB/s  85.2 %CPU
Reading intelligently…       done: 120492 kB/s   0.3 %CPU
Seek numbers calculated on first volume only
Seeker 1…Seeker 2…Seeker 3…start 'em…done…done…done…
              —Sequential Output (nosync)— ---Sequential Input-- --Rnd Seek-
              -Per Char- --Block— -Rewrite-- -Per Char- --Block— --04k (03)-
Machine    MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU   /sec %CPU
mbx-xe 3*2048 77290 92.9 87286  7.8 46068  1.1 73689 85.2120492  0.3  104.1  0.0

The server is running Xen kernel, this test are from the hypervisor with 2 cores dedicated and 1GB RAM dedicated to.

Do this numbers are in the normal performance?

What numbers do u have?

Thanks all for your time :smileyvery-happy:

These numbers may vary depending on people’s systems - os and hardware.  Have you checked online for specs on this?