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-
- ╔══ ╔══ RELEASE NOTES Pre-Release Version 0.5
- ╚═╗╔╗╠╔══ September 25, 1990
- ══╝╚╝║╚═╗╔══╔═╗╔═╗ OVERVIEW:
- ══╝╚══╚═╩╝ ╚ SofScan is a storage media laboratory test utility; one
- you might expect to find in use by a certification/refurbishment facility.
- SofScan tests DOS formatted media response under user controlled soft error
- threshold levels, reporting the slightest discrepancy. Other disk test soft-
- ware that relies on the BIOS for hardware status will usually locate only the
- unrecoverable (hard) errors. The job of the disk hardware and BIOS is simply
- \"whatever it takes... get the data\". Usually the BIOS design does not com-
- plain to DOS or concern the user with the expected occasional recoverable
- (soft) error. The hardware and BIOS may only, after exhaustive \"grinding\",
- return an error status in lieu of the data. This good/bad method unfortunately
- masks the marginal soft error media surface defects. Ignored, many of these
- soft spots deteriorate and the user is informed (only after it is too late)
- with the old familiar prompt \"Abort, Retry, Fail?\".
-
- SofScan scrutinizes the disk read operation fully, thus flushing out the up
- and coming media errors. Periodic use allows the discriminating PC user to
- maintain an above average confidence level in his storage media. Many
- previously unsalvageable hard disks have been placed back in service with the
- help of SofScan.
-
- ╔══ ╔══ FEATURE SUMMARY:
- ╚═╗╔╗╠╔══ SofScan is a multi-step test process. A minimum of
- ══╝╚╝║╚═╗╔══╔═╗╔═╗ four scans repeatedly READ the disk test area. The
- ══╝╚══╚═╩╝ ╚ final critical step, marking-BAD clusters, is turned
- over to Norton Utilities DT-Disk Test. As many as 999 scans can be used to
- certify continuous duty capable DOS media storage logical units. Any single
- error incidence is trapped and reported. Files using error prone clusters are
- reported by cluster number and file name. User settings customize the error
- sensitivity level. A continuous dated record of cluster error history may be
- maintained on the SofScan diskette. The error list is written as a batch file
- named CLUSTERS.BAT on drive A:.
-
- Norton's DT-Disk Test has an often overlooked command line option (/Cnnn) that
- manually marks clusters BAD. Conversely, GOOD clusters which are marked BAD
- may be returned to service with the switch /Cnnn-. DT verifies that the
- to-be-marked cluster is not INUSE by a file.
-
- Upon detection of an INUSE soft cluster, SofScan locates the complete path and
- file name to include in the error report. This feature facilitates the manual
- process of using DOS COPY to move each file to safety. The original must be
- erased to release the INUSE soft cluster for marking BAD. Always mark any
- UNUSED BAD clusters before moving the associated files of INUSE BAD clusters.
- Of course you may mark the affected clusters by any other means available.
-
- ╔══ ╔══ OPTIONS DESCRIPTION:
- ╚═╗╔╗╠╔══ The Soft Error Threshold option directs SofScan to
- ══╝╚╝║╚═╗╔══╔═╗╔═╗ lower or raise the error determination level. Level
- ══╝╚══╚═╩╝ ╚ [0] might cause SofScan to issue false error reports.
- Alternately, Threshold Level [9] is capable of masking minor defects. By
- definition, soft errors are often inconsistent. Continued testing is recom-
- mended until new errors fail to appear. Using the Beginning and Ending Cluster
- options you can limit testing to one area. Passes through the test clusters
- may be set from [4] to [999] to facilitate overnight or even week-long testing
- sessions. SofScan's unique process traps and reports any single cluster read
- retry. The estimated test time is updated following any option selection
- affecting the total run time.
- Test Clusters previously marked BAD [ReTested] will verify marked-BAD
- clusters. Thus allow the user to mark GOOD a cluster if it appears to be
- mistakenly marked-BAD. Do not be whimsical about marking-GOOD a BAD cluster;
- soft errors are inconsistent.
-
- Caching controllers read the entire track when any cluster on the track is
- requested. Therefore, all clusters on a track with a real error will, in
- succession, report as BAD. If the Passes setting is less than the number of
- clusters per track, additional sessions will continue to tag the remaining
- clusters of the bad track. Disk Caching Software distorts the cluster
- granularity even further. It must be removed to obtain valid test results.
- Error level 32512 is forced for very bad clusters. This level may also be
- reported erroneously if timer interrupts are masked by the Disk BIOS.
-
-
- ╔══ ╔══ TESTING OPERATIONS - PHASE ONE:
- ╚═╗╔╗╠╔══
- ══╝╚╝║╚═╗╔══╔═╗╔═╗ Requires: SofScan.EXE in Diskette Drive A:
- ══╝╚══╚═╩╝ ╚
- 1. Remove all Disk Cache, TSRs, etc. The easy method is to boot DOS from a
- floppy which bypasses the normal CONFIG.SYS and AUTOEXEC.BAT hard disk
- startup routines. You may make a boot floppy entering: FORMAT A:/S
-
- 2. Log to the drive to be tested (SofScan only tests the default drive).
- Insert the SofScan program and test report diskette in drive A: and enter:
- A:SofScan
-
- 3. Select test options from the menu and press G to Go or Q to Quit.
-
- 4. As SofScan tests the disk the current pass and minutes required are shown.
- The current test cluster displays at the right edge of the screen.
-
- 5. After the last pass, SofScan will pause to allow you to review the screen
- error listing. A duplicate is saved to the output file CLUSTERS.BAT.
-
- SofScan's command line options are /B,/E,/S,/P,/T for Beginning, Ending,
- SoftErrorThreshold, Passes and BadTesting respectively.
-
-
-
- ╔══ ╔══ MARKING OPERATIONS - PHASE TWO:
- ╚═╗╔╗╠╔══ Requires: Norton Utils DT-Disk Test 4.00 DOS 3.30 dn
- ══╝╚╝║╚═╗╔══╔═╗╔═╗ Norton Utils DT-Disk Test 4.50 DOS 3.31 up
- ══╝╚══╚═╩╝ ╚ A:clusters.BAT
-
- 1. Ensure that DT-Disk Test is on your hard disk and can be found by the PATH.
- You may review A:CLUSTERS by entering: A:clusters [with no keyword]
-
- 2. Mark UNUSED BAD clusters, if any, first by entering: A:clusters MARKBAD
-
- 3. If INUSE bad clusters are reported move each file to a safe location using
- DOS COPY if possible. (If not, STOP and seek professional assistance in
- recovering critical data.) Erase each original file to release the INUSE
- BAD clusters to be marked BAD. Enter: A:clusters FILESMOVED
-
- 4. If GOOD clusters are found to be marked-BAD and you are confident they
- are dependable, enter the following: A:clusters MARKGOOD
-
- ┌──────────────────────────────────────────────────────────────────────────────┐
- │Thank you for your support! If you have found SofScan useful, the licensing │
- │fee of $19 via CreditCard will get you a full function version immediately. │
- │We also distribute UPS COD or check prepaid USMAIL. Please call: │
- │Allen Swann, 162 Lincoln Ave., Winter Park, Florida 32789 (407) 695-8859 │
- └──────────────────────────────────────────────────────────────────────────────┘
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