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2-16
GmING READY
2.5.2 Partition Type
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WARNING: BACKUP ALL FILES BEFORE CHANGING THE
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PARTITION TYPE, AS RE-INITIALIZATION
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OF DISK WILL DESTROY EXISTING DATA.
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******* •••• **.*.**.* •••••••••••••••••••••••••••••• *****
The partition type of the Winchester drive specifies the way the
storage space is partitioned. Each partition type is an emulation of a
particular HP disk drive product. for example, 1.2 MB (Partition type
of Opt. 201) emulation will look like an 8" floppy drive (HP9895A) to
your HP computer. There are four major ways that a storage space can
be
partitioned, which are referred as Option 201, 205, 210 and 215.
Option 201 means partitioning into units of 1.2 MS.
Similarly, Option
205, 210 and 215 stands for 5 MS, 10 MB, and 15 MS block respectively.
The partition type of each HP-IB port can
be
set independently by its
configuration switch. Keys #2 through 14 (Labeled as P2, P1, P0) of the
configuration switch are used to specify the partition type, as listed
in Table 2.4.
When the disk drive powers up, the priority of disk space
all ocati on is. from Port 1 to Port 3.
If
the di sk dri ve is
over-partitioned, i.e. the total configured capacity is larger than the
actual storage of the disk drive, some of the ports may not be
configured with any storage capacity. for example, if you have Model
3030 with Option 532, and each port is configured to partition type 2
(Option 215, 15 MB), then Port 1 and 2 will each has 15 MS, but Port 3
will
have
no
Winchester
storage.
If
the
disk drive is
under-partitioned, the left-over storage space is allocated to the
Shared Information Space (Option 660) and invisible floppies in that
order.
Table 2.4
Switch Setting for Winchester Partition Type
PARTIT
I
N TYPE
EQV.
HP MODEL
P2 P1 P0
OPTION EMULATION
DESCRIPTION
0 0 0
N/A
Winchester capacity=0
0 0 1
205
9134A
2 units of 5 MB
Opt. 10
0 1 0
215
9133XV
1 units of 15 MS
0 1 1
201
9134A(9895A)
2 units of 1.2 MB
1
0 0
201
9134A(9895A)
4 units of 1.2 MB
1 0 1
Reserved
1 1 0
205
9134A
1 unit of 5 MB
Opt. 10
1 1 1
210
9134B
1 unit of 10 MB
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