Yes I think a random 4k test (read/write) would be quite a nice to have to. This is where I have experienced serious problems or severe performance degradation on such as USB sticks or SDHC orCF...
Type: Posts; User: sforum; Keyword(s):
no random 4k published - so what for is this test on a SDHC card useful
Yes I think a random 4k test (read/write) would be quite a nice to have to. This is where I have experienced serious problems or severe performance degradation on such as USB sticks or SDHC orCF...
Link to kernel disk performance drop
http://lwn.net/Articles/478440
Memory / disk performance drop
Is this maybe the cause?
http://lwn.net/Articles/478440/http://lwn.net/Articles/478440/
Please study this
http://www.ibm.com/developerworks/wikis/display/LinuxP/SCSI+-+Hot+add,+remove,+rescan+of+SCSI+devices
Study this link
http://www.ibm.com/developerworks/wikis/display/LinuxP/SCSI+-+Hot+add,+remove,+rescan+of+SCSI+devices
Kernel 3.0.0 disk io performance drop
Using lvm with two disks I have experienced a significant disk IO performance drop on 3.0.0
compared to 2.6.39.3 more significantly on random write IO.
Has someone else experienced similar?
...
disk io performance drop 3.0.0 kernel
Currently I have experienced a substantial disk IO performance drop with the latest 3.0
kernel
on a 2 disk lvm most significantly on random write IO
Has someone else experienced something...