Latop harddrive (2.5", 5400RPM), ZFS and the new ahci in FreeBSD 8 stable
Code:
ada0: <Hitachi HTS543232L9SA00 FB4OC43C> ATA/ATAPI-8 SATA 1.x device
ada0: 150.000MB/s transfers (SATA 1.x, UDMA6, PIO size 8192bytes)
ada0: Command Queueing enabled
/dev/ada0
512 # sectorsize
320072933376 # mediasize in bytes (298G)
625142448 # mediasize in sectors
620181 # Cylinders according to firmware.
16 # Heads according to firmware.
63 # Sectors according to firmware.
081105FB2400LECP257A # Disk ident.
I/O command overhead:
time to read 10MB block 0.487962 sec = 0.024 msec/sector
time to read 20480 sectors 2.898023 sec = 0.142 msec/sector
calculated command overhead = 0.118 msec/sector
Seek times:
Full stroke: 250 iter in 6.993660 sec = 27.975 msec
Half stroke: 250 iter in 5.626813 sec = 22.507 msec
Quarter stroke: 500 iter in 9.323333 sec = 18.647 msec
Short forward: 400 iter in 2.720834 sec = 6.802 msec
Short backward: 400 iter in 3.033109 sec = 7.583 msec
Seq outer: 2048 iter in 0.391258 sec = 0.191 msec
Seq inner: 2048 iter in 0.394341 sec = 0.193 msec
Transfer rates:
outside: 102400 kbytes in 1.662847 sec = 61581 kbytes/sec
middle: 102400 kbytes in 1.938533 sec = 52823 kbytes/sec
inside: 102400 kbytes in 3.416859 sec = 29969 kbytes/sec