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Quantum Q250

Quantum Q250
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HEAD 0
HEAD 1
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HEAD 5
HEAD
0
HEAD 1
•
HEAD 5
•
NEXT
CYL
x
x
+ 32
x +
159
x + 1 x + 2 x + 29
(Bad)
x + 33 x + 60
XXXX
x + 160 x +
161
x + 188
x
= logical block address
of
initial sector
Q280: cylinder number x 190; Q250; cylinder x 126
(Assuming 512 byte logical block size)
XXXXX
= deallocated sector
x + 30
x +
61
x + 189
(spare)
Figure
4-3:
In-Line
Sparing
of
Defective
Sectors
x
x
+ 32
x +
61
x +
157
x + 1
x + 2
x + 29
(Bad)
x + 33
(Bad)
XXXX
XXX X
x + 186
x
= logical block address
of
initial sector
Q280: cylinder number
x 190; Q250; cylinder x 126
(Assuming 512 byte logical block size)
XXXXX
= deallocated sector
x + 30
x + 60
x + 187
(spare)
(spare)
x +
31
x + 62
(spare)
x +
31
(Bad)
XXXX
x + 188
(spare)
x + 189
(spare)
Figure
4-4:
In-Line
Sparing
Overflow
of
Defective
Sectors
4-7

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