IBM RS/6000 7025 manual Disk Maintenance Service Aid, Scsi

Disk Maintenance Service Aid

Ÿ Disk to Disk Copy Service Aid

ŸDisplay/Alter Sector Service Aid

Disk

to

Disk

Copy

Service Aid

The

service

aid allows

you

to

recover

data from

an

old

drive

when

replacing

it

with a

new

drive. The

service aid only supports copying from a

drive

to

another

drive

of

similar size. This service aid cannot be used

to

update

to

a

different

size

drive.

migratepv

command should be used when updating drives. The service aid

recovers

all

LVM

software

reassigned blocks. To prevent corrupted

data

from

being

copied

to

the

new drive, the service aid aborts if an unrecoverable read error is

detected. To help prevent possible problems with the new

drive,

the

service aid

aborts

if the

number

of

bad

blocks being

reassigned

reaches

a

threshold.

The

procedure

for using this service aid requires that both

the old and new disks b

installed

in

or

attached

to

the system

with unique SCSI addresses. This

requires

that

the

new

disk

drive

SCSI

address

must

be

set

to

an

address

that

is

not

currently

in used and the drive be installed in an empty location. If

there

are

no

empty

locations,

then

one of the other drives has to be removed. Once the copy

is

complete,

only

one

drive

may remain installed. Either remove

the

target

drive

to

return

to

the

original

configuration,

or

perform

the

following procedure

to

complete

the

replacement

of

the

old

drive

with

the

new

drive.

1. Remove both drives.

2. Set the SCSI address of the new drive to the SCSI address of the old drive.

3. Install the new drive in the old drive's location.

4. Install any other drives that were removed into their original location.

To prevent	problems that may			occur	when	running	this	service aid from disk, it is
suggested	that	this	service	aid	be run	from	the	diagnostics that are loaded from
removable	media	when	possible.

7-12IBM RS/6000 7025 F50 Series User's Guide