Messages in this thread | | | Date | Wed, 21 Mar 2001 09:56:56 +0000 | From | quintaq@yahoo ... | Subject | Re: UDMA 100 / PIIX4 question |
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On Tue, 20 Mar 2001 16:32:48 -0500 (EST) Mark Hahn <hahn@coffee.psychology.mcmaster.ca> wrote:
> > .... hdparm -t cannot be effected by the filesystem > that lives in the partition, since hdparm is doing reads that don't > go through the filesystem. hmm, I wonder if that's it: if you mount > the FS that's in hda1, it might change the block driver configuration > (changing the blocksize, for instance). that would effect hdparm, > even though its reads don't go through the FS. > > prediction: if you comment out the hda1 line in fstab, and reboot, > so that vfat never gets mounted on that partition, I predict that > hdparm will show >30.19 MB/s on it. >
Hi Mark,
I commented out the line. Mtab now reported:
/dev/hda7 / ext2 rw 0 0 proc /proc proc rw 0 0 /dev/hda5 /boot ext2 rw 0 0 devpts /dev/pts devpts rw 0 0
The result of hdparm -tT /dev/hda was, however, exactly the same as before (ie circa 15 MB/sec. The results for /dev/hda7 remain at about 30 MB/sec.
Further, even though the relevant line was commented out of fstab, I could still perform hdparm -tT /dev/hda1 (giving the usual 15 MB/sec). I suppose that this is because fdisk still showed :
Disk /dev/hda: 255 heads, 63 sectors, 3737 cylinders Units = cylinders of 16065 * 512 bytes
Device Boot Start End Blocks Id System /dev/hda1 * 1 932 7486258+ b Win95 FAT32 /dev/hda2 933 3737 22531162+ 5 Extended /dev/hda5 933 935 24066 83 Linux /dev/hda6 936 952 136521 82 Linux swap /dev/hda7 953 3737 22370481 83 Linux
On the other hand, am I correct in interpreting the bonnie output for the block read (included in my earlier post), of 20937 KB/sec as reasonably healthy for my DTLA (ie consistent with hdparm's 30 MB/sec), when performing more realistic tasks on the linux filesystem ?
Regards,
Geoff
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