basically, i got the mybook world edition 2 a few months ago from my brother and it was working fine then.
had a good transfer speed of 10MB/s which im guessing is the limit of my 100Mbps network.
but recently it started going slower and slower…
right now the transfer speed is only 2-3MB/s which is to slow to work with in lightroom or to watch a movie at full HD…
to shed some light i logged into the device and did a hdparm …
dacotacowd:~# hdparm -tT /dev/md2 /dev/md2: Timing cached reads: 242 MB in 2.00 seconds = 120.94 MB/sec Timing buffered disk reads: 7 MB in 3.31 seconds = 3.45 MB/sec dacotacowd:~# umount /mnt/data/ dacotacowd:~# hdparm -tT /dev/md2 /dev/md2: Timing cached reads: 270 MB in 2.00 seconds = 134.99 MB/sec Timing buffered disk reads: 22 MB in 3.31 seconds = 6.65 MB/sec wait, why is it so much faster when the raid is unmounted ?
can anyone shed some light here? :/ a fix?
EDIT : extra info
dacotacowd:~# cat /proc/mdstat Personalities : [linear] [raid0] [raid1] md2 : active raid1 sda4[0] sdb4[1] 973525343 blocks super 1.2 [2/2] [UU] md1 : active raid1 sdb2[1] sda2[0] 256896 blocks [2/2] [UU] md3 : active raid1 sdb3[1] sda3[0] 987904 blocks [2/2] [UU] md0 : active raid1 sda1[0] 1959872 blocks [2/1] [U_] unused devices: <none> ~ # hdparm -Tt /dev/sda1 /dev/sda1: Timing cached reads: 290 MB in 2.00 seconds = 144.96 MB/sec Timing buffered disk reads: 60 MB in 3.07 seconds = 19.57 MB/sec ~ # hdparm -Tt /dev/sda4 /dev/sda4: Timing cached reads: 264 MB in 2.01 seconds = 131.64 MB/sec Timing buffered disk reads: 14 MB in 3.52 seconds = 3.97 MB/sec ~ #