Revision 0d413fc6
| b/snf-image-helper/disklabel.py | ||
|---|---|---|
| 94 | 94 |
"""Packs a CHS tuple to an address string.""" |
| 95 | 95 |
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| 96 | 96 |
assert 1 <= sector <= 63 |
| 97 |
assert 0 <= cylinder <= 1023 |
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| 98 | 97 |
assert 0 <= head <= 255 |
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assert 0 <= cylinder |
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| 99 |
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# If the cylinders overflow then put the value (1023, 254, 63) to |
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# the tuple. At least this is what OpenBSD does. |
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if cylinder > 1023: |
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cylinder = 1023 |
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head = 254 |
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sector = 63 |
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| 99 | 106 |
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| 100 | 107 |
byte0 = head |
| 101 | 108 |
byte1 = (cylinder >> 2) & 0xC0 | sector |
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