Revision 0188611b
| b/lib/backend.py | ||
|---|---|---|
| 1595 | 1595 |
@param size: The size in MiB to write |
| 1596 | 1596 |
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""" |
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# Internal sizes are always in Mebibytes; if the following "dd" command |
|
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# should use a different block size the offset and size given to this |
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# function must be adjusted accordingly before being passed to "dd". |
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block_size = 1024 * 1024 |
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cmd = [constants.DD_CMD, "if=/dev/zero", "seek=%d" % offset, |
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"bs=%d" % constants.WIPE_BLOCK_SIZE, "oflag=direct", "of=%s" % path,
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"bs=%s" % block_size, "oflag=direct", "of=%s" % path,
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"count=%d" % size] |
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result = utils.RunCmd(cmd) |
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|
| ... | ... | |
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_Fail("Cannot execute wipe for device %s: device not found", disk.iv_name)
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| 1626 | 1631 |
|
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# Do cross verify some of the parameters |
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if offset < 0: |
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_Fail("Negative offset")
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if size < 0: |
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_Fail("Negative size")
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if offset > rdev.size: |
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_Fail("Offset is bigger than device size")
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if (offset + size) > rdev.size: |
| b/lib/constants.py | ||
|---|---|---|
| 129 | 129 |
|
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# Wipe |
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DD_CMD = "dd" |
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WIPE_BLOCK_SIZE = 1024 ** 2 |
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| 133 | 132 |
MAX_WIPE_CHUNK = 1024 # 1GB |
| 134 | 133 |
MIN_WIPE_CHUNK_PERCENT = 10 |
| 135 | 134 |
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