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1996-07-10
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Number: A1TH090490U570
Subject: IDE Drive Won't Work with New ISADISK
Date: January 28, 1991
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PROBLEM: We had a customer who was trying to use a Swift ST1126A IDE
drive with ELS II v2.15. He had the new drivers for IDE
drives. It wouldn't allow him to COMPSURF the drive. The
drive had 1072 cylinders x 7 heads x 29 sectors per track.
There is a drive type in setup for this. He had tried Disk
Manager-N without success. He had also tried it on several
different machines.
COMMENTS: These are some problems with IDE drives:
1) The fact that some of them have to be user defined is a
problem. Novell at this point does not fully support
user defined drives.
2) They cannot be low level formatted. Do not low level
format these drives with NetWare utilities.
3) ECC format (the number of bits that are used for error
correction) is switchable on the drive so you must
match the setting on the drive with the disk controller
ECC setting.
4) When chaining IDE drives together, the first drive is
the "master" drive and all others are "slave" drives.
This IDE specification makes the "slave" drives totally
dependent on the "master" drive for commands. Because
of this drive protocol, you cannot mirror IDE drives.
You are forced to duplex them.
NOTE: See IDE.TXT on NetWire library 12 for a detailed
explanation of all the support issues regarding IDE drives.
(X) This information was verified by Engineering.