HP C2488A Technical Reference Manual page 82

Mode Select, Mode Sense
Page Code 04H, Rigid disk Drive Geometry Parameters (Non-Savable Page)
Bit
Byte 7 6 5
I
4
I
3
I
2
i
1
I
0
00
PS
Reserved
Page Code = 04H
01 Page Length In Bytes: SCSI (CCS) = 12H; SCSI-2 = 16H
02-04
(MSB=02) Number Of Cylinders (LSB=04)
05
(MSB=02)
Number Of Heads
(LSB=042)
06-08
(MSB=06) Starting Cylinder, Write Precomp (LSB=08)
09-11
(MSB=09)
Starting Cylinder, Reduced Write Current
(LSB=l1)
12-13
(MSB=12)
Drive Step Rate
(LSB=13)
14-16
(MSB=14)
Landing Zone Cylinder
(LSB=16)
17-19 SCSI (CCS): Reserved (last bytes)
SCSI-2 Bytes Follow
17 Reserved
I
RPL
18 Rotational Offset
19 Reserved
20-21 (MSB=20) Media Rotation Rate (LSB=21)
22-23 Reserved
Page 04H Parameter values
Parameter Default Changeable Allowable Range
Values
(hex)
Number Of Cylinders 0803
Number Of Heads: C2486 = 11 OB
Number Of Heads: C2488 = 14
OE
Number Of Heads: C2490 = 17
11
Starting Cylinder: Write Precomp (Not Used)
000000
Starting Cylinder: Reduced Write Current 000000
(Not Used)
Drive Step Rate
0000
Landing Zone Cylinder 000000
RPL (SCSI-2 only; Rotational Position 00
Locking)
Rotational Offset (from input sync signal;
00
SCSI-2 only)
Media Rotation Rate (SCSI-2 only)
1518
A~26 SCSI Command Descriptions
Values
No
No
No
No
No
No
No
No
Yes
Yes
No
nla
nla
nla
nla
nla
nla
nla
nla
• 00 = No locking
• 01 = Slave
• 10 = Master
0- 255 (Note: each unit represents 1/256th
revolution of the disk.)
nla
DRAFT
1/18/93 09:58