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Title
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I received the error message - edge: Received only u blocks, u bytes instead of expected d blocks
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Keywords
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BackupEDGE edge restore verify block factor tape setblk getblk
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Product Release(s)
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02.02.0x 02.01.00 02.00.0x 01.02.0x 01.01.0x
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Problem Description
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I received the error message - edge: Received only u blocks,
u bytes instead of expected d blocks
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Cause
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Usually this error can be traced to a discrepancy in block modes.
In most instances this error occurs when a tape is made on one
machine and is read on a second machine. For example a machine
running under SCO 3.2v4.2 creates the archive, then attempting to
read the tape on a system running SCO OpenServer 5.
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Solution
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Device Block Mode is the biggest read/write compatibility
stumbling block.
SCO 3.2v4.0 will probably default to 512 byte fixed blocks, while
OpenServer 5.0.4 will ask the tape drive for its default block mode,
which is 0 (variable) for some drives (HP Surestore) and 512 for
others, such as Wangtek.
Since "tape setblk" on 3.2v4.0 is broken, the best way to set the tape
drives to be compatible is, with a tape in the drive, to issue a
"tape -a 512 setblk /dev/xStp0" on the 5.0.4 system.
Reads and writes should then be compatible.
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