Seek Time; Format Drive Command Execution Time; Figure 3. Asa I Oem Thermal Calibration - Seagate ST31250N Product Manual

Barracuda 2LP Product Manual, Rev. D
5.2.1
5.2.2
Start
A
Has
10 min. TCAL
timer
No
expired?
Yes
Reset
10 minute
TCAL timer
Is
SCSI
command in
No
progress?
Yes
Complete
command
Read
ahead
pending?
No
Yes
Hold
(wait for next
command)
Write/Read Independent Read
Miss 10 Minute Sequential
command Periodic command
Abortive Read
Lookahead
Timer
Seek to
TCAL cyl
and select
head zero

Figure 3. ASA I OEM thermal calibration

Seek time

Average typical*
Single track typical*
Full stroke typical*
*Typical seek values are measured under nominal conditions of tempera-
ture, voltage, and horizontal orientation on a representative sample of
drives.

Format drive command execution time

for ≥ ≥ ≥ ≥ ≥ 512-byte sectors
Maximum (with verify)
Maximum (without verify)
TCAL
head
Has
target
received a SCSI
No
command?
Yes
All
heads
calibrated?
All
heads
Yes
calibrated? Yes
No
Select
A
next
head
Drive including
controller overhead
Drive level (msec) without disconnect (msec)
read write read
8.0 9.0 9.0
0.6 0.9 1.6
17 19 18.0
ST31250
15 minutes
10 minutes
13
Complete
command
Read
ahead
pending?
No
Yes
No
Hold
(wait for next
command)
Write/Read Independent Read
Miss 10 Minute Sequential
command Periodic command
Abortive Read
Lookahead
Timer
Has
10 min. TCAL Yes
timer
expired?
No
Seek to
TCAL cyl
and select
next head
write
10.0
1.9
20.0
ST32550
30 minutes
20 minutes