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Is LUN to SSCI, fd to file?
Is Logical Unit Number to SSCI, file descriptor to file?
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#2
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Is LUN to SSCI, fd to file?
Not really.
A scsi device can present multiple LUNs, each representing a separate volume. Traditional JBOD disks have a single LUN 0 with the entire disk on them, but storage arrays can have hundreds of volumes on them, each using a different Logical Unit Number. When you want to do I/O to a volume on a scsi device, you specify the scsi address AND the LUN number. Your operating system will show a disk for each address/LUN pair, so if you have 4 luns on your scsi device, your OS will show 4 disks. Hope that helps, Arne |
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