Northern Telecom DMS-100 Series Maintenance Manual page 37

Procedure 4-1
Disk drive procedures - fault determination
Step Description
5 Reformat the suspect disk - (Procedure
4-2) this procedure lasts 20 to 30 minutes.
If this procedure is unsuccessful, go to step
6. If this procedure is successful, repeat
steps 3 and 4.
6 Set the parameters for the disk drive -
(Procedure 4-7). If this procedure is
unsuccessful, return to step 5. If this
procedure is successful, repeat steps 3 and
4.
7 If mode change to PRIME cannot be
performed successfully, follow the
procedure for replacing disk drive.
Notes:
Note 1: Wait for the MODE xx response to this message; the time for the mode change varies, depending on disk size and
input traffic load. If the disk system status has not changed to redundant, (disk selected in the key sequence above is now
PRIME mode), go to step 3.
Note 2: Initialization is not allowed for DPP systems equipped with:
a. 380-Mbyte disk drives with the 56KB polling feature; if an NT6M94AA or BA PCA is mounted in slot A7 of the DPP
processor chassis, disk initialization is not permitted.
b. 760-Mbyte disk drives, all instances.
(continued)
CAUTION
Use the FORMAT command ONLY when in direct contact with
NT field support personnel. This command may cause a loss of
data. Perform the DISK FORMA T procedure during a period of
low data gathering activity (low traffic) to avoid data losses.
CAUTION
This disk command may cause a loss of data. Perform the DISK
FORMAT procedure during a period of low data gathering
activity (low traffic) to avoid data losses.
End
DPP Recovery and Routine Maintenance Guide BCS35 and up
Disk drive procedures 4-3
Notes
If necessary, see the disk error procedure
sheet for the command to reformat the disk.
Valid for 72-, 140-, and 380- Mbyte disk
drives only, without 56KB polling; no
NT6M94AA PCA mounted in slots A7 and
B7.
See Procedure 4-8 and Procedure 4-9 to
replace a disk drive.