Re: Converting to SCSI. HELP!!!
On Tue, 21 Nov 2000, Brandt Dusthimer wrote:
> and 2, I'm also usually the file sharing server.
so you know you're good ... ;-)
> However, when everyone's uploading/downloading to/from me, I
> experience major system lag and if do anything (even simple command
> prompt stuff) there upload/download time increases a lot.
> SO, being the all powerful linux user that I am,
> I have decided to
> start using SCSI. I am under the assumption that SCSI will help. If
> I am wrong. . . well I don't exactly have money spurting out my
> ears ( I bag groceries ), please tell me that I'm wrong.
What's the computer & LANCard of yours? Are you sure that your system
is using IDE BM-DMA or at least DMA?
First of all check that the drives are working in their best mode.
hdparm -v /dev/hd? will show whether DMA is used. Of interest is also
DRIVE read-ahead. You can tell the capabilities of your
DRIVEs with hdparm -i /dev/hd?. You will find a entry MaxMultSect. Use
that number to set MultSect with hdparm -m number.
Second is the LANCard. If it's an ISAtype or a too simple PCI one,
expect overhead code executed there that sums up under heavy traffic.
Besides other info sources, the boot-messages may already tell you about
your drives & lancard. A debian 2.2 copies them to /var/log/dmesg
A girl in our network has a Fujitsu IDE 15G doing 15MB/sec and an IBM
IDE 15G doing 13 MB/sec. Her LANcard is a cheapo ne2kpci and while
she's gaming she can only tell by the noise from her hard drives that
some guys are using her PC as the compiler station ...