Your manager has decided that the throughput of your file server can be improved
ID: 3554772 • Letter: Y
Question
Your manager has decided that the throughput of your file server can be improved by replacing your old SCSI-2 host adapter with a "fast and wide" SCSI-3 adapter. It has also been decided that the old SCSI-2 drives will be replaced with "fast and wide" SCSI-3 drives that are much larger than the old ones. After all of the files from the old SCSI-2 disks have been moved to the SCSI-3 drives, you reformat the old drives so that they can be used again somewhere. Upon hearing that you did this, your manager tells you to leave the old SCSI-2 drives in the server, because she knows that SCSI-2 is downward compatible with SCSI-3. Being a good employee, you acquiesce to this demand. A few days later, however, you are not surprised when your manager expresses disappointment that the SCSI-3 upgrade does not seem to be delivering the performance improvement that she expected. What happened? How can you fix it?
Explanation / Answer
A SCSI bus is as slow as the slowest device on it, so the SCSI-3 drives are working at SCSI-
2 speeds. This can be fixed by reinstalling the old SCSI-2 host adapter and connecting it to
the old SCSI-2 disks.
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