Date: Sat, 10 Jun 1995 07:47:26 -0400 (EDT) From: Peter Dufault <dufault@hda.com> To: guido@IAEhv.nl (Guido van Rooij) Cc: freebsd-hackers@freebsd.org Subject: Re: Quantum bad && how to disable a sector Message-ID: <199506101147.HAA20268@hda.com> In-Reply-To: <199506100942.LAA03929@iaehv.IAEhv.nl> from "Guido van Rooij" at Jun 10, 95 11:42:24 am
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Guido van Rooij writes:
>
> Hi,
>
>
> Lately I'm getting medium error on my only half a year old Quantum
> empire 2100s. This is already the second time :-(
> I think this is a bad choise for a disk.
Check that the AWRE and ARRE (automatic write reallocation and
automatic read reallocation) are enabled on the drive. You need
2.05 to do it. Edit mode page 1 using scsi:
> scsi -f /dev/rsd0.ctl -m 1 -e
And to save permanently:
> scsi -f /dev/rsd0.ctl -m 1 -e -P 3
> Further: how can I disable that sector? Or can I easily find the inode
> occupying it and clri it?
Once read/write reallocation are on the sector will get mapped out
when a read succeeds after retries or when a write fails. Writes will
be transparent; for hard read failures you will have to (currently)
write trash to that block, or use the following program to map out the
sector.
WARNING: I have not used this program recently. I tested and used it a lot
in the past, and have no reason to believe that it doesn't work
any longer, but please be sure you have backups.
Run the program when the partition with the bogus sector in it is
not mounted.
You will need 2.05 for this to work.
/* slipsec: Slip a sector using "reallocate block".
*
* "WARNING: I have not used this program recently. I tested and used it
* a lot in the past, and have no reason to believe that it doesn't work
* any longer, but please be sure you have backups."
*
* Copyright (C) 1995, HD Associates, Inc.
* PO Box 276
* Pepperell, MA 01463
* 508 433 5266
* dufault@hda.com
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by HD Associates, Inc..
* 4. HD Associates name man not be used
* to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL HD ASSOCIATES BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <stdlib.h>
#include <sys/scsiio.h>
#include <errno.h>
#include <sys/file.h>
#include <scsi.h>
int main(int argc, char *argv[])
{
scsireq_t *scsireq;
int qualifier, type, rmb, modifier, iso, ecma, ansi;
char vendor_id[17], product_id[17], revision[5];
int lba, len;
int i;
int fid;
u_char *inq_buf = malloc(96), *lbas;
u_long block = 0;
int n;
if (argc < 3)
{
fprintf(stderr, "Usage: %s device sector1 ... sectorn\n", argv[0]);
exit(-1);
}
fid = scsi_open(argv[1], O_RDWR);
if (fid == -1)
{
perror(argv[1]);
exit(errno);
}
scsireq = scsireq_build(scsireq_new(),
96, inq_buf, SCCMD_READ,
"12 0 0 0 v 0", 96);
if (scsireq_enter(fid, scsireq) == -1)
{
scsi_debug(stderr, -1, scsireq);
exit(errno);
}
scsireq_decode(scsireq, "b3 b5 b1 b7 b2 b3 b3 s8 z16 z16 z4",
&qualifier, &type, &rmb, &modifier, &iso, &ecma, &ansi,
vendor_id, product_id, revision);
printf("%s %s %s\n", vendor_id, product_id, revision);
if (type != 0)
{
printf("This is not a direct access device.\n");
exit(0);
}
switch(ansi)
{
case 0:
printf("WARNING: This device might not comply to any standard.\n");
break;
case 1:
printf("This is a SCSI-1 device.\n");
break;
case 2:
printf("This is a SCSI-2 device.\n");
break;
}
/* How many blocks?
*/
if (scsireq_enter(fid, scsireq_build(scsireq,
8, inq_buf, SCCMD_READ,
"25 0 0 0 0 0 0 0 0 0")) == -1) /* Read capacity */
{
scsi_debug(stderr, -1, scsireq);
exit(errno);
}
scsireq_decode(scsireq, "i4 i4", &lba, &len);
printf("The device has %d %d byte blocks.\n", lba, len);
fflush(stdout);
/* Verify all blocks seem reasonable first:
*/
for (i = 2; i < argc; i++)
{
if ((block = strtoul(argv[i], 0, 0)) > lba)
{
fprintf(stderr,
"Block at %ld outside of maximum %d.\n", block, lba);
exit(-1);
}
}
n = i - 2;
len = 4 + 4 * n;
if ( (lbas = malloc(len)) == 0 )
{
perror("malloc");
exit(errno);
}
(void)scsireq_build(scsireq,
len, lbas, SCCMD_WRITE,
"07 0 0 0 0 0");
scsireq_encode(scsireq, "0 0 v:i2 ", 4 * n);
for (i = 0; i < n; i++)
scsireq_encode(scsireq, "sv v:i4 ", 4 + 4 * i, strtoul(argv[i + 2], 0, 0));
if (scsireq_enter(fid, scsireq) == -1)
{
perror("scsireq_enter");
exit(errno);
}
/* Did we get sense?
*/
if (scsireq->senselen_used)
{
int valid, code, key, info, asc, ascq;
scsireq_buff_decode(scsireq->sense, scsireq->senselen_used,
"b1 b7 *i1 *b4 b4 i4 s12 i1 i1", &valid, &code,
&key, &info, &asc, &ascq);
printf("Block %lx: valid %d code %02x sense key %02x info %x asc %02x ascq %02x\n",
block, valid, code, key, info, asc, ascq);
fflush(stdout);
}
exit(0);
}
--
Peter Dufault Real Time Machine Control and Simulation
HD Associates, Inc. Voice: 508 433 6936
dufault@hda.com Fax: 508 433 5267
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