Quantum FIREBALL PLUS AS 10.2 User Manual

ATA Bus Interface and ATA Commands
6-78 Quantum Fireball Plus AS 10.2/20.5/30.0/40.0/60.0 GB AT
Table 6-33
Table 6-33 Table 6-33
Table 6-33 Configuration Command Format
Note:
Note:Note:
Note: All fields marked RESERVED or N/A should be set to zero.
6.7.28.5
6.7.28.56.7.28.5
6.7.28.5 Quantum Configuration Key (Bytes 0-31)
Quantum Configuration Key (Bytes 0-31)Quantum Configuration Key (Bytes 0-31)
Quantum Configuration Key (Bytes 0-31)
Bytes 0–6 must contain the ASCII characters Q, U, A, N, T, U, and M; byte 7, the
ASCII character space; and bytes 8–20 must contain the ASCII characters C, O, N,
F, I, G, U, R, A, T, I, O, and N. Bytes 21–31 must contain an ASCII space. If this
information is not entered correctly, the drive aborts the COMMAND.
6.7.28.6
6.7.28.66.7.28.6
6.7.28.6 DisCache Parameters
DisCache ParametersDisCache Parameters
DisCache Parameters
PE – Prefetch Enable (Byte 32, Bit 1): When set to 1, this bit indicates that the
drive will perform prefetching. A PE bit set to 0 indicates that no prefetching will
occur. The CE bit (bit 0) must be set to 1 to enable use of the PE bit. The default
value is 1.
CE – Cache Enable (Byte 32, Bit 0): When set to 1, this bit indicates that the drive
will activate caching on all READ commands. With the CE bit set to 0, the drive will
disable caching and use the RAM only as a transfer buffer. The default setting is 1.
6.7.28.7
6.7.28.76.7.28.7
6.7.28.7 Error Recovery Parameters
Error Recovery ParametersError Recovery Parameters
Error Recovery Parameters
AWRE – Automatic Write Reallocation Enabled (Byte 36, Bit 7): When set to 1,
indicates that the drive will enable automatic reallocation of bad blocks. Automatic
Write Reallocation is similar to the function of Automatic Read Reallocation, but is
initiated by the drive when a defective block has become inaccessible for writing.
An AWRE bit set to 0 indicates that the Quantum Fireball Plus AS 10.2/20.5/30.0/
40.0/60.0 GB AT drives will not automatically reallocate bad blocks. The default
setting is 1.
ARR – Automatic Read Reallocation (Byte 36, Bit 6): When set to 1, this bit
indicates that the drive will enable automatic reallocation of bad sectors. The drive
initiates reallocation when the ARR bit is set to 1 and the drive encounters a hard
error—that is, if the triple-burst ECC algorithm is invoked. The default setting is 1.
When the ARR bit is set to 0, the drive will not perform automatic reallocation of
bad sectors. If RC (byte 36, bit 4) is 1, the drive ignores this bit. The default value
is 1.
BYTE
BYTEBYTE
BYTE BIT
BITBIT
BIT
7
77
76
66
65
55
54
44
43
33
32
22
21
11
10
00
0
0–31 QUANTUM CONFIGURATION KEY
32 RESERVED = 0 PE CE
33 RESERVED
34 RESERVED = 0
35 RESERVED = 0
36 AWRE ARR N/A RC EEC N/A N/A DCR
37 NUMBER OF RETRIES
38 ECC CORRECTION SPAN
39 RESERVED = 0 WCE RUEE 0
40–511 RESERVED = 0

Quantum FIREBALL PLUS AS 10.2 Specifications

General

Brand	Quantum
Model	FIREBALL PLUS AS 10.2
Category	Storage
Language	English