Disk
Drive
Capacities
Table 1·1.
HP
C2486A/88A/90A SCSI Disk Drive Capacities
These
nuniliers
are
for
comparison
only. Capacities
are
calculated
using
a 512-byte sector.
When
other
sector
sizes
are
used,
formatted
capacities will change.
Unformatted
capacities
are
given
in
parenthesis
(
).
Zone
0
Zone
1 .
Zone
2
Zone
3
Zone
4
Zone
5
Zone
6
(Outer)
Data
Tracks
per
Surface:
478 171 136 150 140 178 144
Data
Sectors
per
Track:
116 112 108 104 100
96
92
Data
Bytes
per
Track:
59,392 57,344 55,296 53,248 51,200 49,152 47,104
(71,572) (69,104) (66,636) (64,168) (61,700) (59,232) (56,764)
Data
Sectors
per
Cylinder:
C2486A 1,276 1,232 1,188 1,144 1,100 1,056 1,012
C2488A 1,624 1,568 1,512 1,456 1,400 1,344 1,288
C2490A 1,972 1,904 1,836 1,768 1,700 1,632 1,564
Data
Bytes
per
Cylinder:
C2486A 653,312 630,784 608,256 585,728 563,200 540,672 518,144
(787,292) (760,144) (732,996) (705,848) (678,700) (651,552) (624,404)
C2488A 831,488 802,816 774,144 745,472 716,800 688,128 659,456
(1,002,008) (967,456) (932,904) (898,352) (863,800) (829,248) (794,696)
C2490A 1,009,664 974,848 940,032 905,216 870,400 835,584 800,768
(1,216,724) (1,174,768) (1,132,812) (1,090,856) (1,048,900) (1,006,944) (964,988)
C2486A
C2488A
C2490A'
Data
Surfaces
per
Drive:
11
14 17
Data
Bytes
per
Sector:
512 (617) 512 (617) 512 (617)
Data
Sectors
per
Surface:
230,168 230,168 230,168
Data
Bytes
per
Surface:
117,846,016 117,846,016 117,846,016
Data
Cylinders
per
Drive:
1 2,467 2,467 2,467
Data
Sectors
per
Drive:
2,531,848 3,222,352 3,912,856
Data
Bytes
per
Drive:
1,296,306,176 1,649,844,224 2,003,382,272
(1,562,150,216) (1,988,191,184) (2,414,232,152)
...
Notes:
1.
There
are
2531
total
cylinders
per
drive,
allocated
as
follows: 2467
data
cylinders, 63
spare
cylinders,
and
2
cylinders
reserved
for
logs
and
maintenance
infonnation.
Partial
cylinders
have
been
rounded
to
the
next
whole
number.
Refer
to
Chapter
3,
Table
3-1 for a complete cylinder
allocation
list.
(continued
on
next
page)
1·4
Product SpecHications DRAFT
1/18/93 09:58