IBM 6151 Maintenance And Service Manual page 112

86x
RT PC Extended ESDI Magnetic Media Adapter
Additional Tests: None
Removal Procedure: See Adapter Removal in Section 4.
Repair Checkout: If your SRN also contains an SRA number
of 98A, each fixed disk attached to this
adapter must be formatted again.
Note: This destroys all data recorded on
the fixed disk.
To format the fixed disk, use the Format
Fixed-Disk utility. If needed, see Section
2.
Run the System Checkout.
87x
Keylock
Additional Tests: None
Removal Procedure: See Keylock Removal in Section 4.
Repair Checkout: Run the System Checkout.
3-0020-34 Service Manual