سرعت هارد در سرورهای مجازی:

بدون رید:
کد:
 
/dev/sda:
Timing cached reads: 39204 MB in 1.99 seconds = 19651.98 MB/sec
Timing buffered disk reads: 404 MB in 3.01 seconds = 134.14 MB/sec
/dev/sdb:
Timing cached reads: 39768 MB in 1.99 seconds = 19936.28 MB/sec
Timing buffered disk reads: 402 MB in 3.00 seconds = 133.82 MB/sec
با رید نرم‌افزاری:
کد:
 
[root@datafarm ~]# hdparm -tT /dev/md0

/dev/md0:
 Timing cached reads:   38796 MB in  1.99 seconds = 19448.70 MB/sec
 Timing buffered disk reads:  1410 MB in  3.01 seconds = 468.17 MB/sec

سرعت کپی با رید نرم‌افزاری:
کد:
[root@datafarm ~]# dd if=/dev/md0 of=100mbtest bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.100617 seconds, 1.0 GB/s
سرعت کپی بدون رید:
کد:
[root@datafarm ~]# dd if=/dev/sda1 of=10Gtest bs=1M count=100
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.130622 seconds, 803 MB/s