IBM iSeries 270 - Dedicated Service Tools (DST) Procedures; Exchange a Disk Unit with Device Parity Protection; Exchange a Disk Unit with Mirrored Protection; Initialize Disk Unit and Copy to Disk

Exchange a disk unit with device parity protection
Exchange a disk unit with mirrored protection
Resume mirrored protection
Save data and initialize disk unit
Initialize disk unit and copy to disk
Dedicated service tools (DST) procedures
Start disk service here: For use by authorized service providers.
Before exchanging a disk unit, you must attempt to save customer data. This procedure directs you to the
correct recovery procedure to use when attempting to save customer data.
1. Is the disk unit a type 673x?
v No: Continue with the next step.
v Yes: Type 673x is a read cache which does not contain data that needs to be saved. Exchange the
read cache using the disk unit procedure in the “Remove and replace procedures” on page 2 topic.
Note: If you can get to a Dedicated Service Tools (DST) or System Service Tools (SST) screen use
the concurrent maintenance procedure.
This
ends the procedure.
2.
Choose one of the following:
v If your system has mirrored protection for the failing disk unit, go to “Exchange a disk unit with
mirrored protection” on page 542. (See “Determine storage protection status” below.)
This ends the procedure.
v If your system has device parity protection for the failing disk unit, go to “Exchange a disk unit with
device parity protection” on page 541. (See “Determine storage protection status” below.)
This ends the procedure.
v If neither of the above conditions apply, then continue with the next step.
3.
You are exchanging the disk unit. Choose from the following:
v To save the data by copying to tape, go to “Save data and initialize disk unit” on page 546.
v To save the data by copying to another disk, go to Initialize disk unit and copy to disk.
This
ends the procedure.
Determine
storage protection status: The customer should know if the system is configured for storage
protection and should have kept a printout of the storage protection configuration. Ask the customer for
this information.
If the customer does not know if the system has storage protection configured on it, and the system does
not IPL to Dedicated Service Tools (DST), then contact your next level of support. Otherwise, perform the
following procedure.
1. Select System Service Tools (SST).
If
you cannot get to SST, select DST (see Dedicated Service Tools (DST) in the iSeries Service
Functions
) book.
Note: Do not IPL the system to get to DST.
2. From the Service Tools display, select Work with disk units—>Display disk
configuration—>Display disk configuration status.
540 Hardware (Remove and Replace; Part Locations and Listings)