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DateTue, 06 Jan 1998 09:02:17 +0000
FromSteve Logue <>
SubjectJaz drive and EXT2FS - HELP! - (long)
Hello,

Can anyone give me some ideas on where and what to check to help
diagnose a filesystem/SCSI/Jaz drive prob?  I have been haveing my
filesystem crash on my Jaz cartridge for no apperant reason.  Each time
I get messages listed at the end of this message.  I have gone through
my whole system looking for anything that might be the culprit.  I have
an Adaptec 2940 UW with the latest BIOS, and am using the latest stable
kernel.  It is on IRQ 15, but I have all IDE turned off in my system
BIOS.  The internal 68-pin cable is terminated by my harddrive, and the
internal 50-pin cable is terminated with the passive termination block
that comes from Iomega.  Termination of the card is set to the LOW byte
off, and HIGH byte on (not-automatic).  I have limited the bus speed to
10 Mb to the Jaz drive, and CDROM, and 40 Mb to the card, and my hard
drive.  SCAM in enable, but Extended Translation is off.  The following
are the settings that I entered when I compiled my kernel:  I have run
badblocks -vw /dev/sdb1 1044464 many times, and have never seen an
error.  I have also low level formatted this specific cartridge just to
be sure.  Lastly, I do not have any problems with this specific
drive/cartridge under heavy usage in Win95, or FreeBSD.

-STEVEl


CONFIG_SCSI_AIC7XXX=y
CONFIG_AIC7XXX_TAGGED_QUEUEING=y
CONFIG_OVERRIDE_CMDS=y
CONFIG_AIC7XXX_CMDS_PER_LUN=64
CONFIG_AIC7XXX_PAGE_ENABLE=y
CONFIG_AIC7XXX_PROC_STATS=y
CONFIG_AIC7XXX_RESET_DELAY=5


Here is the dmesg output that is relative:


aic7xxx: <Adaptec AHA-294X Ultra SCSI host adapter> at PCI 10
aic7xxx: BIOS enabled, IO Port 0xe400, IO Mem 0xe7000000, IRQ 15,
Revision C
aic7xxx: Wide Channel, SCSI ID 7, 16/255 SCBs, QFull 16, QMask 0x1f
scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 4.1.1/3.2.1
scsi : 1 host.
scsi0: Scanning channel A for devices.
  Vendor: SEAGATE   Model: ST32155W          Rev: 0596
  Type:   Direct-Access                      ANSI SCSI revision: 02
Detected scsi disk sda at scsi0, channel 0, id 0, lun 0
  Vendor: PLEXTOR   Model: CD-ROM PX-4XCE    Rev: 1.01
  Type:   CD-ROM                             ANSI SCSI revision: 02
Detected scsi CD-ROM sr0 at scsi0, channel 0, id 3, lun 0
  Vendor: iomega    Model: jaz 1GB           Rev: J.83
  Type:   Direct-Access                      ANSI SCSI revision: 02
Detected scsi removable disk sdb at scsi0, channel 0, id 4, lun 0
scsi : detected 1 SCSI cdrom 2 SCSI disks total.
SCSI device sda: hdwr sector= 512 bytes. Sectors= 4197405 [2049 MB] [2.0
GB]
SCSI device sdb: hdwr sector= 512 bytes. Sectors= 2091050 [1021 MB] [1.0
GB]
sdb: Write Protect is off

Here is the /proc filesystem statistics:


Adaptec AIC7xxx driver version: 4.1.1/3.2.1
Compile Options:
  AIC7XXX_RESET_DELAY    : 5
  AIC7XXX_CMDS_PER_LUN   : 64
  AIC7XXX_TAGGED_QUEUEING: Enabled
  AIC7XXX_PAGE_ENABLE    : Enabled
  AIC7XXX_PROC_STATS     : Enabled

Adapter Configuration:
           SCSI Adapter: Adaptec AHA-294X Ultra SCSI host adapter
                         (AIC-788x chipset)
               Host Bus: Wide
                Base IO: 0xe400
         Base IO Memory: 0xe7000000
                    IRQ: 15
                   SCBs: Used 87, HW 16, Page 255
             Interrupts: 182831
          Serial EEPROM: True
   Extended Translation: Disabled
         SCSI Bus Reset: Enabled
             Ultra SCSI: Enabled
Disconnect Enable Flags: 0xffff
Statistics:
CHAN#A (TGT 0 LUN 0):
nxfers 177021 (93604 read;83417 written)
blks(512) rd=1410456; blks(512) wr=719134
        < 512 512-1K   1-2K   2-4K   4-8K  8-16K 16-32K 32-64K 64-128K
>128K
 Reads:     1      0  40673   7118  18951  17474   3751   3146
2490      0
Writes:     0      0  51747  19549   7095   2154    953    428
1491      0

CHAN#A (TGT 3 LUN 0):
nxfers 5 (5 read;0 written)
blks(512) rd=9; blks(512) wr=0
        < 512 512-1K   1-2K   2-4K   4-8K  8-16K 16-32K 32-64K 64-128K
>128K
 Reads:     2      1      0      2      0      0      0      0
0      0
Writes:     0      0      0      0      0      0      0      0
0      0

CHAN#A (TGT 4 LUN 0):
nxfers 5641 (2179 read;3462 written)
blks(512) rd=101235; blks(512) wr=417958
        < 512 512-1K   1-2K   2-4K   4-8K  8-16K 16-32K 32-64K 64-128K
>128K
 Reads:     1      1   1203      0      3    134      8    785
44      0
Writes:     0      0    849    468    278    128     23     40
1676      0


Lastly, these are a sample of the errors that I am getting.  I have
gotten many of them, and have only put an example of everyking here for
reading.  I have the filesystem mounted with the option:
"check=strict".


messages:Jan  6 00:28:53 bock kernel: EXT2-fs warning (device 08:11):
ext2_free_inode: bit already cleared for inode 140761

messages.2:Dec 21 22:48:41 logues kernel: EXT2-fs error (device 08:11):
ext2_readdir: bad entry in directory #16385: rec_len % 4 != 0 -
offset=0, inode=1701996900, rec_len=29795, name_len=29295

messages.2:Dec 21 22:49:33 logues kernel: EXT2-fs error (device 08:11):
ext2_find_entry: bad entry in directory #16385: rec_len % 4 != 0 -
offset=1024, inode=1701996900, rec_len=29795, name_len=29295

messages.2:Dec 23 17:17:03 logues kernel: EXT2-fs error (device 08:11):
ext2_free_blocks: Freeing blocks not in datazone - block = 1283566791,
count = 1

messages.2:Dec 26 17:40:47 logues kernel: EXT2-fs warning (device
08:11): ext2_rmdir: empty directory has nlink!=2 (3)


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