Timing cached reads: 1904 MB in 2.00 seconds = 949.77 MB/sec
Timing buffered disk reads: 150 MB in 3.04 seconds = 49.35 MB/sec
with 4 raptors....the only difference between Raid 5 and no raid with these drives is my read levels go down to 12.....cached reads stay at 9hundred-sumthn'.
readonly = 0 (off)
readahead = 256 (on)
geometry = 15648/2/4, sectors = 97642752, start = 0
Timing cached reads: 1900 MB in 2.00 seconds = 948.72 MB/sec
Timing buffered disk reads: 160 MB in 3.04 seconds = 52.71 MB/sec
Not sure how to improve performance on r5 other than stripe size.
How can I smooth out the writing to the drive so it doesn't buffer and then dump the entire contents of the buffer to the drive, halting all other IO on the drive?
Not haveing experianced this,I can not answer...sorry.