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Old 13th November 2008
DrJ DrJ is offline
ISO Quartermaster
 
Join Date: Apr 2008
Location: Gold Country, CA
Posts: 507
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Seagate 10K.6 (SCSI), six (?) years old.

Code:
%diskinfo -c -t /dev/da1
/dev/da1
	512         	# sectorsize
	73407865856 	# mediasize in bytes (68G)
	143374738   	# mediasize in sectors
	8924        	# Cylinders according to firmware.
	255         	# Heads according to firmware.
	63          	# Sectors according to firmware.

I/O command overhead:
	time to read 10MB block      0.153230 sec	=    0.007 msec/sector
	time to read 20480 sectors   2.956085 sec	=    0.144 msec/sector
	calculated command overhead			=    0.137 msec/sector

Seek times:
	Full stroke:	  250 iter in   2.993079 sec =   11.972 msec
	Half stroke:	  250 iter in   2.252052 sec =    9.008 msec
	Quarter stroke:	  500 iter in   3.684958 sec =    7.370 msec
	Short forward:	  400 iter in   1.307076 sec =    3.268 msec
	Short backward:	  400 iter in   1.153268 sec =    2.883 msec
	Seq outer:	 2048 iter in   0.247746 sec =    0.121 msec
	Seq inner:	 2048 iter in   0.247390 sec =    0.121 msec
Transfer rates:
	outside:       102400 kbytes in   1.510717 sec =    67782 kbytes/sec
	middle:        102400 kbytes in   1.835884 sec =    55777 kbytes/sec
	inside:        102400 kbytes in   2.726458 sec =    37558 kbytes/sec
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