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-
-This driver supports the Qlogic FASXXX family of chips. This driver
-only works with the ISA, VLB, and PCMCIA versions of the Qlogic
-FastSCSI! cards as well as any other card based on the FASXX chip
-(including the Control Concepts SCSI/IDE/SIO/PIO/FDC cards).
-
-This driver does NOT support the PCI version. Support for these PCI
-Qlogic boards:
-
- * IQ-PCI
- * IQ-PCI-10
- * IQ-PCI-D
-
-is provided by the qla1280 driver.
-
-Nor does it support the PCI-Basic, which is supported by the
-'am53c974' driver.
-
-PCMCIA SUPPORT
-
-This currently only works if the card is enabled first from DOS. This
-means you will have to load your socket and card services, and
-QL41DOS.SYS and QL40ENBL.SYS. These are a minimum, but loading the
-rest of the modules won't interfere with the operation. The next
-thing to do is load the kernel without resetting the hardware, which
-can be a simple ctrl-alt-delete with a boot floppy, or by using
-loadlin with the kernel image accessible from DOS. If you are using
-the Linux PCMCIA driver, you will have to adjust it or otherwise stop
-it from configuring the card.
-
-I am working with the PCMCIA group to make it more flexible, but that
-may take a while.
-
-ALL CARDS
-
-The top of the qlogic.c file has a number of defines that controls
-configuration. As shipped, it provides a balance between speed and
-function. If there are any problems, try setting SLOW_CABLE to 1, and
-then try changing USE_IRQ and TURBO_PDMA to zero. If you are familiar
-with SCSI, there are other settings which can tune the bus.
-
-It may be a good idea to enable RESET_AT_START, especially if the
-devices may not have been just powered up, or if you are restarting
-after a crash, since they may be busy trying to complete the last
-command or something. It comes up faster if this is set to zero, and
-if you have reliable hardware and connections it may be more useful to
-not reset things.
-
-SOME TROUBLESHOOTING TIPS
-
-Make sure it works properly under DOS. You should also do an initial FDISK
-on a new drive if you want partitions.
-
-Don't enable all the speedups first. If anything is wrong, they will make
-any problem worse.
-
-IMPORTANT
-
-The best way to test if your cables, termination, etc. are good is to
-copy a very big file (e.g. a doublespace container file, or a very
-large executable or archive). It should be at least 5 megabytes, but
-you can do multiple tests on smaller files. Then do a COMP to verify
-that the file copied properly. (Turn off all caching when doing these
-tests, otherwise you will test your RAM and not the files). Then do
-10 COMPs, comparing the same file on the SCSI hard drive, i.e. "COMP
-realbig.doc realbig.doc". Then do it after the computer gets warm.
-
-I noticed my system which seems to work 100% would fail this test if
-the computer was left on for a few hours. It was worse with longer
-cables, and more devices on the SCSI bus. What seems to happen is
-that it gets a false ACK causing an extra byte to be inserted into the
-stream (and this is not detected). This can be caused by bad
-termination (the ACK can be reflected), or by noise when the chips
-work less well because of the heat, or when cables get too long for
-the speed.
-
-Remember, if it doesn't work under DOS, it probably won't work under
-Linux.