Maxtor ATLAS 10K III - Manual (Page 133)

SCSI Description
Maxtor Atlas 10K III 5-69
Software
Selectable
SCSI ID
0
When SSSIE (Byte 3, bit 7) = 1, this field determines the disk drive’s SCSI
ID. When changing SCSI ID via the MODE SELECT command, the SCSI ID
changes after the next reset or power cycle. If at initial power on the SSSIE
bit is set to 1 (the bit’s previous setting was saved to disk) the Software
Selectable SCSI ID field’s value determines the disk drive’s SCSI ID.
Reselection
Retries
7
The value of this field specifies the number of reselection attempts the drive
will make to the initiator. A value of 0 indicates an infinite number of rese-
lection attempts.
ERSS 0
Enable Rotational Position Locking (RPL) Sector Synchronization.
0QV WUGF
D[ VJG FTKXG
Stagger
Spin
0
When the value of this field =1, the Stagger Spin Delay field (Bytes 6 & 7)
is in effect. The disk drive operates as if its Spin Delay jumper was installed.
Auto Master
Enable
0
When this field = 0, this disk drive does not act as the master in a storage
array configuration (refer to the Hard Disk Geometry page). When this field
= 1, this disk drive becomes the master.
0QV WUGF D[ VJG FTKXG
Force 8 0
When this field = 0, 16-bit wide data transfer responses are allowed.
When this field = 1, negotiations are limited to 8-bit responses.
DFCP 0 Delay Following Command Phase. 0QV WUGF D[ VJG FTKXG
PXM 0
Preserve Synchronous and Wide Mode. If set = 1, this bit causes the disk
drive to preserve the most recent wide and synchronous states for all initi-
ators across power on resets, bus reset, and bus device reset messages.
0QV WUGF D[ VJG FTKXG
ISN 0
Initiate Synchronous Negotiation. When this field is set = 1, the disk drive
initiates a synchronous transfer negotiation with the initiator. This is done
on the first selection with ATTENTION following a power on reset, bus re-
set, or bus device reset. The negotiation is done for each initiator. Note that
if both ISN and IWN (Byte 5, bit 0) are set =1, the wide data transfer ne-
gotiation takes place first.
IWN 0
Initiate Wide Negotiation. When this field is set = 1, the disk drive initiates
a wide data transfer negotiation with the initiator. This is done on the first
selection with ATTENTION following a power on reset, bus reset, or bus de-
vice reset. The negotiation is done for each initiator. Note that if the disk
drive is not capable of actually transferring data on a wide bus, the firmware
will only negotiate for an 8-bit bus. If both ISN (Byte 5, bit 1) and IWN are
set =1, the wide data transfer negotiation takes place first. A wide data
transfer negotiation causes the disk drive to reset any synchronous agree-
ment to asynchronous mode.
Stagger
Spin Delay
28h
The Stagger Spin Delay is a value in 100 millisecond units that is used to
determine the length of the period of time delay before starting the disk
drive’s motor if the Stagger Spin feature is used. The actual amount of the
delay is determined using the following formula:
Spin Up Delay = (SCSI ID x Stagger Spin Delay).
Refer to the description of Delay Spin (Byte 3, bit 4).
Note that for the value in Stagger Spin Delay field to have effect, the Spin
Delay hardware jumper must be installed (Chapter 3).
ASDP 0
Always Save Data Pointers. If set = 1, the drive will always send an SDP
message before sending a DISCONNECT message.
Enable Quiet 0 Enable Quiet Seek Mode. If set = 1, Quiet Seek mode is enabled.
USCIO 0
Use Same Cylinder Optimization in OPTWORK. When set = 1, helps multi-
ple sequential streams.
SAE 0 Show All Errors. When this field = 1, errors usually hidden are shown.
(KGNF &GHCWNV &GUETKRVKQP