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I just installed RedHat 8.0 yesterday, and overall it's
pretty good. However, it seems to be running VERY sluggishly. My hardware is AMD K6/2 500 mhz, 128 MB ram, 20 GB 7200 rpm Fujistsu HD. My swap size is 256 MB.
Any ideas on why this may be?
I have this drive setup using the RedHat8 / hdparm config script that is configured with /etc/sysconfig/harddisks :-
[root@criten wayne]# more /etc/sysconfig/harddisks
# These options are used to tune the hard drives -
# read the hdparm man page for more information
# Set this to 1 to enable DMA. This might cause some
# data corruption on certain chipset / hard drive
# combinations. This is used with the "-d" option
# Multiple sector I/O. a feature of most modern IDE hard drives,
# permitting the transfer of multiple sectors per I/O interrupt,
# rather than the usual one sector per interrupt. When this feature
# is enabled, it typically reduces operating system overhead for disk
# I/O by 30-50%. On many systems, it also provides increased data
# throughput of anywhere from 5% to 50%. Some drives, however (most
# notably the WD Caviar series), seem to run slower with multiple mode
# enabled. Under rare circumstances, such failures can result in
# massive filesystem corruption. USE WITH CAUTION AND BACKUP.
# This is the sector count for multiple sector I/O - the "-m" option
# (E)IDE 32-bit I/O support (to interface card)
# Enable drive read-lookahead
# Add extra parameters here if wanted
# On reasonably new hardware, you may want to try -X66, -X67 or -X68
# Other flags you might want to experiment with are -u1, -a and -m
# See the hdparm manpage (man hdparm) for details and more options.
If your drive will handle DMA and also multi sector reads, then you have big gains ahead by turning them on.
Checkout your drives capabilities with /sbin/hdparm -i /dev/hda like so:-