Format Track (50H: Vendor Specific) - IBM DBCA-204860 - Travelstar 4.8 GB Hard Drive Specifications

12.4 Format Track (50h: Vendor Specific)

C o m m a n d B l o c k O u t p u t R e g i s t e r s
R e g i s t e r
D a t a
F e a t u r e
S e c t o r C o u n t
S e c t o r N u m b e r
C y l i n d e r L o w
C y l i n d e r H i g h
D e v i c e / H e a d
C o m m a n d
E r r o r R e g i s t e r
7 6 5
C R C U N C 0 I D N
0 0 0
Figure 62. Format Track Command (50h)
The Format Track command formats a single logical track on the device. Each good sector of data on the
track will be initialized to zero with write operation. At this time, whether the sector of data is initialized
correctly is not verified with read operation. Any data previously stored on the track will be lost.
The host transfers a sector of data containing a format table to the device. The format table should contain
two bytes for each sector on the track to be formatted.The structure of format table is shown in Figure 63
on page 103. The first byte should contain a descriptor value and the second byte should contain the sector
number. The descriptor value should be 0 for a good sector, and any other descriptor value will cause an
aborted error. The remaining bytes of the sector following the format table are ignored.
Since device performance is optimal at 1:1 interleave, and the device uses relative block addressing internally,
the device will always format a track in the same way no matter what sector numbering is specified in the
format table.
Output Parameters To The Device
Sector Number In LBA mode, this register specifies LBA address bits 0 - 7 to be formatted. ( L = 1 )
Cylinder High/Low The cylinder number of the track to be formatted. ( L = 0 )
In LBA mode, this register specifies LBA address bits 8 - 15 (Low), 16 - 23 (High) to
be formatted. ( L = 1 )
H The head number of the track to be formatted. ( L = 0 )
In LBA mode, this register specifies LBA address bits 24 - 27 to be formatted. ( L = 1 )
102
O E M Specifications of DBCA-2xxxxx 2.5 inch H D D
7 6 5 4 3 2 1 0
V V V V V V V V
V V V V V V V V
V V V V V V V V
1 L 1 D H H H H
0 1 0 1 0 0 0 0
4 3 2 1 0
0 A B T T 0 N A M N
V 0 V 0 0
C o m m a n d B l o c k I n p u t R e g i s t e r s
R e g i s t e r 7 6 5 4 3 2 1 0
D a t a
E r r o r . . . S e e B e l o w . . .
S e c t o r C o u n t
S e c t o r N u m b e r V V V V V V V V
C y l i n d e r L o w V V V V V V V V
C y l i n d e r H i g h V V V V V V V V
D e v i c e / H e a d
S t a t u s . . . S e e B e l o w . . .
S t a t u s R e g i s t e r
7 6 5 4 3
B S Y R D Y D F D S C D R Q C O R I D X E R R
0 V V V
H H H H
2 1 0
0 V