Seagate ST15150N Product Manual - Page 23

Seek time, Format drive command execution time, byte sectors

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ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D 13 Start A Has 10 min. timer expired? No Yes Set 10 minute timer Is SCSI command in No progress? Yes Complete Command TCAL head Has target received a SCSI No command? Has No target received a SCSI command? All heads calibrated? Yes No Yes All heads calibrated? No Yes Yes Target completes SCSI command Select next head Seek to TCAL cyl and select A next head Seek to TCAL cyl and select head zero 5.2.1 5.2.2 Figure 3. OEM interruptible thermal calibration implementation Seek time Average typ* Single track typ* Full stroke typ* Drive level (msec) read write 8.0 9.0 0.6 0.9 17 19 Drive including controller overhead without disconnect* (msec) read write 9.0 10.0 1.6 1.9 18.0 20.0 *Typical seek values are measured under nominal conditions of temperature, voltage, and horizontal orientation on a representative sample of drives. Format drive command execution time for ≥ 512-byte sectors Maximum (with verify) 60 minutes Maximum (without verify) 40 minutes

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ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D
13
Start
Has
10 min.
timer
expired?
Set
10 minute
timer
Yes
No
Yes
A
Is
SCSI
command in
progress?
No
Complete
Command
Seek to
TCAL cyl
and select
head zero
TCAL
head
Has
target
received a SCSI
command?
No
Yes
All
heads
calibrated?
Yes
A
All
heads
calibrated?
No
Yes
Select
next
head
No
Has
target
received a SCSI
command?
Yes
No
Target
completes
SCSI
command
Seek to
TCAL cyl
and select
next head
5.2.1
Seek time
Drive including
controller overhead
Drive level (msec)
without disconnect* (msec)
read
write
read
write
Average typ*
8.0
9.0
9.0
10.0
Single track typ*
0.6
0.9
1.6
1.9
Full stroke typ*
17
19
18.0
20.0
*Typical seek values are measured under nominal conditions of tempera-
ture, voltage, and horizontal orientation on a representative sample of
drives.
5.2.2
Format drive command execution time
for
≥
512-byte sectors
Maximum (with verify)
60 minutes
Maximum (without verify)
40 minutes
Figure 3. OEM interruptible thermal calibration implementation