IBM RS/6000 7025 manual Considerations, Drives, Ssa

Considerations

Bay A comes with one 3.5-inch, 1.44MB diskette drive in A2 and a CD-ROM in A1.

Bay B supports two 5.25-inch, or 3.5 inch half-high, removable-media devices.

Bay B also supports a disk drive in a special carrier when bays C, D, and E are configured with SSA disk drives or SCSI RAID disk drives.

You cannot install hot-swappable drives in bays A or B.

Banks

C,

D,

and

E

can

accommodate six slim-high

drives

or

three

half-high drives, or

a combination

of both drive sizes. If

you

use

a combination,

remember

that

one

half-high drive uses the equivalent

space of

two

slim-high

drives.

Your

system

supports eighteen 3.5-inch,

slim-high

(1.0

inch),

disk

drives

or

nine

3.5-inch, half-high (1.6 inch) disk drives in the bottom three banks

(C,

D, and E) or a

combination of slim and half-high drives.

Before

installing

disk

drives in bank

D

and

E,

you

must

order disk

drive

backplanes

for

bank

D

and E. Depending on your configuration,

you

may

need

to

order

and

install up to two additional SCSI-2 adapters. The internal Ultra

SCSI

option

is

supported

in

backplanes C, D, and E and

requires

one

Ultra

SCSI

adapter

per

bank.

The

internal

Serial

Storage

Architecture

(SSA)

option

is

supported

in

backplanes

C,

D, and E and requires one SSA adapter

that

supports

all

three

banks. To

order,

contact

your

authorized

reseller or

marketing representative.)

Hot Swap

Drives

The

hot-swap backplane contains logic that allows you

to

remove

disk

drives

without

turning

off

system

power. The base

system

has a

hot-swap

backplane

installed

in

bank

C. You can install six hot-swappable disk

drives

into

the

bays

in

bank

C. You

can

order additional hot-swap backplanes for banks D

and

E. Banks

C,

D,

and

E

each

contain

six

bays. You

can

install up

to

six

disk

drives

in

bank

C,

bank

D, or

bank

E.

Attention:

Proper

procedures

must

be

followed

whenever

you

remove

a

disk

drive.

Hot

swap capability is available only with hot swap backplanes, and

hot

swap

carriers for

the

disk drive.

5-42IBM RS/6000 7025 F50 Series User's Guide