From: swaliff@afterlife.ncsc.mil (Steve Aliff) Subject: Re: Maxtor 7213A owners: read this! (replacement drive installed) Date: 30 Sep 1992 22:00:10 GMT
Follow-up to the Maxtor 7213A problem:
I received a replacement drive from Maxtor, PCBA rev level 63A. I
installed this new drive, first under DOS, then under Linux. Under
DOS, I executed Norton Utilities' CALIBRAT pattern test with 5
patterns -- no problems found. I also executed On Track's read-only
diagnostics -- no problems.
I booted Linux using the SLS 0.96c boot disk and partitioned the
drive; after installing the SLS release, I executed "ufstst" as
before. While I still get a small number of timeouts (8 for the
entire run), I no longer get garbled data. I changed HD_DELAY to
1,000 (per Linus' suggestion) and the timeouts disappeared. Speed
was affected as follows (see the ufstst code posted previously):
HD_DELAY
0: Avg. write rate = 657.34, read = 615.47, rand = 207.99 8 timeouts
1000: Avg. write rate = 657.89, read = 575.45, rand = 208.81 0
900: Avg. write rate = 655.94, read = 576.75, rand = 210.02 2 timeouts
800: Avg. write rate = 653.98, read = 578.41, rand = 208.32 4 timeouts
Since I haven't had the time or inclination to test the entire drive
in this fashion, there may still be undetected problems. However,
the replacement drive clearly performs better than the original.
Since the new SLS release is imminent, I'll be testing it there
soon.
I requested the drive from Maxtor early one week and received it
Friday of the same week.
-- Steve Aliff (swaliff@afterlife.ncsc.mil [144.51.1.1])