Re: getting full usage of memory and disk

Chris Green (greenc@fnal.gov)
Mon, 30 Nov 1998 14:56:56 -0600 (EST)

On Mon, 30 Nov 1998, DooKee Cho wrote:

>
> Hi!
>
> Try
>
> append = "hd=2100,16,63" # hd=cylinders,heads,sectors
>

> You should change cylinders, heads, sectors for your Hard Disk.

You *really* need to know what you're doing if you're going to try this,
especially if you have data already on the disk, or you have partitions
you wish to use with (eg) Windows NT. I would suggest you read the HOWTO
document referenced by a previous posting to this list before considering
anything as drastic as telling the hard drive itself that it has a
different number of cylinders, heads and sectors. This can work, but can
also screw up *really* badly (I had a nasty experience with a medallist
8.6GB drive on a dual-boot machine I was trying to configure). My problem
was fixed by using lba, a 2.0.35 kernel and NT pre-service pack 3, if
anyone is interested.

Regards,
Chris.

>
> Thanks,
> DK
>
>
> ------------------------------------------------------------------
> DooKee Cho/MS352 FERMILAB P.O. BOX 500 Batavia IL 60510-0500
> dkcho@fnal.gov/ href="http://www-d0.fnal.gov/~dkcho">http://www-d0.fnal.gov/~dkcho
>
>
> On Mon, 30 Nov 1998, Stephen Bailey wrote:
>
> >
> > Hi.
> >
> > We recently bought two Gateway 2000 E-4200 machines with
> > 128 MB RAM and 14.4 MB Ultra ATA drives. After installing
> > FNAL Linux 5.0.2, I noticed that only ~7 Gb of disk space
> > was formated (as reported by df, or looking at the partition
> > table with fdisk), and free only reports 64 Mb of memory.
> > When rebooting, the BIOS reports 128 Mb RAM and Gateway's
> > factory tests found 128 Mb. To confirm the hard drive size,
> > I tried booting with a floppy to DOS, and using DOS's fdisk
> > to look at the partitions. It reported a ~13.5 Gb disk, but
> > listed the partitions as being the size that Linux thinks they
> > are with no direct mention of where the missing space is. Curiously,
> > there was a "usage" column with numbers like 49% for a 6 Gb
> > partition and 7% for a 1 Gb partition. Those numbers do not
> > correspond to the amount of data on those disks. i.e. it appears
> > that the ext2 formatting was extremely inefficient in using
> > the space on these drives.
> >
> > Does anyone have experience with either of these problems, or
> > can anyone point me to the appropriate documentation/resources
> > to help me get the full usage of the memory and disk space in
> > these machines?
> >
> > Thanks.
> >
> > Stephen Bailey
> >
> >
> >
>

--
Chris Green. HEP, Purdue University. CDF SVXII project. 
Based at Fermilab. MAIL greenc@fnal.gov; PHONE (630) 840-2308