Drive Activity Led - Seagate ST3146855LC - Cheetah 146.8 GB Hard Drive Product Manual

9.11

Drive activity LED

The following table provides drive activity LED status.
Table 25: Drive activity LED status
Spindle status
Spinning up with DC power applied
Spun down
Powered down by removal of DC
power
Spun up
Spun down
Spun down
Spun down
Spun down
Spun up
Spun up
Spun up
Spun up
Spun up
Spun up
Spun up
76
Command status
N/A
Start Unit
N/A
Stop Unit
No command activity
Write/Read Buffer
SCSI Bus Reset
Test Unit Ready
No command activity
Write/Read
SCSI Bus Reset
Test Unit Ready
Format with Immediate option on
Format without Immediate
Write Same Command in prog-
ress
LED status
On until spinup is complete
On while processing the command
Off due to absence of power
On while processing the command
Off
On while processing the command
On while processing the reset
On while processing the command
Off
On while processing the command
On while processing the reset
On while processing the command
On while the command is initially processed
LED toggles on/off on each cylinder boundary
Toggles on/off
Cheetah 15K.5 SCSI Product Manual, Rev. H