Maxtor Disconnect-Reconnect, Maxtor Atlas 10K IIIUGTXGFHQTVJG5%5+%%5QRGTCVKPIOQFG, Emdp, Dtdc

SCSI Description

￿￿￿￿￿￿￿￿&KUEQPPGEV;4GEQPPGEVThe Disconnect–Reconnect￿2CIG￿￿￿￿PageJ￿￿provides the application client the means to attempt to optimize the performance of the delivery subsystem. The data format and field descriptions are described in Table 5-66and Table 5-67.

Disconnect–Reconnect Page (Page 2)

0

PS

Rsvd

Page Code (02h)

1

Page Length (0Eh)

Buffer Full Ratio

3

Buffer Empty Ratio

– 5

Bus Inactivity Limit

6 – 7

Disconnect Time Limit

8 – 9

Connect Time Limit

10 – 11

Maximum Burst Size

12

EMDP

Fairness Arbitration

DImm

DTDC

13

Reserved

14 – 15

First Burst Size

Table5-66

$[VG$KV

Disconnect-Reconnect-￿Field Descriptions￿(Page￿￿2)￿

Table5-

Parameters Savable. This bit is only used with the MODE SENSE com-

67

(KGNFPS

&GHCWNV8CNWG0 ￿

mand. A returned value of 1 indicates&GUETKRVKQPthat the target is capable of sav-

ing the page in a non-volatile, vendor-specific location. The bit is

reserved with the MODE SELECT command.

Buffer Full

The Buffer Full Ratio indicates how full the buffer should be prior to re-

Ratio

0

questing an interconnect tenancy. Applies to READ operations only.

The default of 0 indicates to the drive that it should use its default ratio.

Buffer Empty

The Buffer Empty Ratio indicates how full the buffer should be prior to

Ratio

0

requesting an interconnect tenancy. Applies to READ operations only.

The default of 0 indicates to the drive that it should use its default ratio.

Bus Inactivity

The Bus Inactivity Limit indicates the maximum duration of any inter-

0

connect tenancy during which no data is transferred.

Limit

The Disconnect Time Limit specifies the minimum time, in 100 micro-

Disconnect

second increments, that the drive waits after releasing the SCSI bus be-

0

VJG￿FTKXG￿

￿0QV￿UWRRQTVGF￿D[￿

Time Limit

fore reselecting. The drive supports a maximum value of 0xFF. Values

greater than 0xFF are treated as 0xFF. The default value of indicates

that the drive can reslect immediately after releasing the bus.

Connect Time

0

The Connect Time Limit indicates the maximum duration of a single in-

Limit

terconnect tenancy.

The Maximum Burst Size

specifies the maximum amount of data that the drive will transfer dur-

ing a data phase before disconnecting from the bus, assuming it was

Maximum

0

given the disconnect privilege. This value is expressed in increments of

Burst Size

data sectors (that is, a value of 1 indicates 512 bytes, a value of 2 in-

dicates 1024 bytes). The default value of indicates that there is no

limit on the amount of0QVdata￿UWRRQTVGFtransferred￿D[￿VJGper￿FTKXGconnection.￿

5-50

Maxtor Atlas 10K IIIUGTXGF￿HQT￿VJG￿5%5+￿￿￿%%5￿QRGTCVKPI￿OQFG￿

6JKU￿HKGNF￿KU￿TG￿