IBM DTNA-22160 - Travelstar 2.1 GB Hard Drive Specifications page 133

Note 1.
When Feature register is 03h ( = S e t Transfer mode), the Sector Count Register specifies the transfer mech-
anism. The upper 5 bits define the type of transfer and the low order 3 bits encode the mode value.
PIO Default Transfer Mode
PIO Default Transfer Mode,Disable IORDY
PIO Flow Control Transfer Mode x
Single word DMA mode x
Multiword DMA mode x
Note 2.
If the number of auto reassigned sector reaches the device's reassignment capacity, the write cache function
will be automatically disabled. Although the device still accepts the Set Features command with Feature
register = 02h without error, but the write cache function will remains disabled. For current write cache
function status, please refer to Identify Device Information(129word) by Identify Device command.
Note 3.
After power on reset or hard reset, the device is set to the following features as default.
Write cache
ECC bytes
Read look-ahead
Reverting to power on defaults
00000 000
00000 001
00001 nnn (nnn=000,001,010,011,100)
00010 nnn (nnn=000,001,010)
00100 nnn (nnn=000,001,010)
: Enable
: 4 bytes
: Enable
: Disable
125
Command Descriptions