Re: sa(4) driver changes available for test

From: Kenneth D. Merry <ken_at_FreeBSD.ORG>
Date: Mon, 2 Mar 2015 14:42:40 -0700
On Mon, Mar 02, 2015 at 16:34:34 -0500, Dan Langille wrote:
> 
> > On Mar 2, 2015, at 2:47 PM, Dan Langille <dan_at_langille.org> wrote:
> > 
> > 
> >> On Mar 2, 2015, at 2:07 PM, Dan Langille <dan_at_langille.org> wrote:
> >> 
> >> 
> >>> On Mar 2, 2015, at 12:28 PM, Kenneth D. Merry <ken_at_FreeBSD.ORG> wrote:
> >>> 
> >>> On Mon, Mar 02, 2015 at 11:44:09 -0500, Dan Langille wrote:
> >>>> 
> >>>>> On Mar 2, 2015, at 11:31 AM, Kenneth D. Merry <ken_at_FreeBSD.ORG> wrote:
> >>>>> 
> >>>>> On Mon, Mar 02, 2015 at 11:09:57 -0500, Dan Langille wrote:
> >>>>>> 
> >>>>>>> On Mar 1, 2015, at 9:29 PM, Kenneth D. Merry <ken_at_FreeBSD.ORG> wrote:
> >>>>>>> 
> >>>>>>> On Sun, Mar 01, 2015 at 19:41:07 -0500, Dan Langille wrote:
> >>>>>>>> 
> >>>>>>>>> On Mar 1, 2015, at 7:31 PM, Kenneth D. Merry <ken_at_FreeBSD.ORG> wrote:
> >>>>>>>>> 
> >>>>>>>>> On Sun, Mar 01, 2015 at 19:15:05 -0500, Dan Langille wrote:
> >>>>>>>>>> 
> >>>>>>>>>>> On Feb 17, 2015, at 1:36 PM, Kenneth D. Merry <ken_at_freebsd.org> wrote:
> >>>>>>>>>>> 
> >>>>>>>>>>> On Sat, Feb 14, 2015 at 18:22:43 -0500, Dan Langille wrote:
> >>>>>>>>>>>> 
> >>>>>>>>>>>>> On Feb 13, 2015, at 7:32 PM, Kenneth D. Merry <ken_at_freebsd.org> wrote:
> >>>>>>>>>>>>> 
> >>>>>>>>>>>>> 
> >>>>>>>>>>>>> I have a fairly large set of changes to the sa(4) driver and mt(1) driver
> >>>>>>>>>>>>> that I'm planning to commit in the near future.
> >>>>>>>>>>>>> 
> >>>>>>>>>>>>> A description of the changes is here and below in this message.
> >>>>>>>>>>>>> 
> >>>>>>>>>>>>> If you have tape hardware and the inclination, I'd appreciate testing and
> >>>>>>>>>>>>> feedback.
> >>>>>>>>>>>> 
> >>>>>>>>>>>> I have a DLT 8000 and an SDLT 220.
> >>>>>>>>>>>> 
> >>>>>>>>>>>> I don't have anything running current, but I have a spare machine which I could use for testing.
> >>>>>>>>>>>> 
> >>>>>>>>>>>> Do you see any value is tests with that hardware? I'd be testing it via Bacula.
> >>>>>>>>>>>> 
> >>>>>>>>>>>> disclosure: I'm the sysutils/bacula-* maintainer and a Bacula committer.
> >>>>>>>>>>>> 
> >>>>>>>>>>> 
> >>>>>>>>>>> Actually, yes.  Bacula is a bit tricky to configure, so your trying it out
> >>>>>>>>>>> would be helpful if you have the time.
> >>>>>>>>>>> 
> >>>>>>>>>>> In looking at the manuals for both the SDLT 220 and the DLT 8000, they both
> >>>>>>>>>>> claim to support long position information for the SCSI READ POSITION
> >>>>>>>>>>> command.
> >>>>>>>>>>> 
> >>>>>>>>>>> You can see what I'm talking about by doing:
> >>>>>>>>>>> 
> >>>>>>>>>>> mt eod
> >>>>>>>>>>> mt status
> >>>>>>>>>>> 
> >>>>>>>>>>> On my DDS-4 tape drive, this shows:
> >>>>>>>>>>> 
> >>>>>>>>>>> # mt -f /dev/nsa3 status
> >>>>>>>>>>> Drive: sa3: <SEAGATE DAT    06240-XXX 8071> Serial Number: HJ00YWY
> >>>>>>>>>>> ---------------------------------
> >>>>>>>>>>> Mode      Density              Blocksize      bpi      Compression
> >>>>>>>>>>> Current:  0x26:DDS-4           1024 bytes     97000    enabled (DCLZ)
> >>>>>>>>>>> ---------------------------------
> >>>>>>>>>>> Current Driver State: at rest.
> >>>>>>>>>>> ---------------------------------
> >>>>>>>>>>> Partition:   0      Calc File Number:  -1     Calc Record Number: -1
> >>>>>>>>>>> Residual:    0  Reported File Number:  -1 Reported Record Number: -1
> >>>>>>>>>>> Flags: None
> >>>>>>>>>>> 
> >>>>>>>>>>> But on an LTO-5, which will give long position information, I get:
> >>>>>>>>>>> 
> >>>>>>>>>>> [root_at_doc ~]# mt status
> >>>>>>>>>>> Drive: sa0: <IBM ULTRIUM-HH5 E4J1>
> >>>>>>>>>>> ---------------------------------
> >>>>>>>>>>> Mode      Density              Blocksize      bpi      Compression
> >>>>>>>>>>> Current:  0x58:LTO-5           variable       384607   enabled (0x1)
> >>>>>>>>>>> ---------------------------------
> >>>>>>>>>>> Current Driver State: at rest.
> >>>>>>>>>>> ---------------------------------
> >>>>>>>>>>> Partition:   0      Calc File Number:   2     Calc Record Number: -1
> >>>>>>>>>>> Residual:    0  Reported File Number:   2 Reported Record Number: 32373
> >>>>>>>>>>> Flags: None
> >>>>>>>>>>> 
> >>>>>>>>>>> That, in combination with the changes I made to the position information
> >>>>>>>>>>> code in the driver, mean that even the old MTIOCGET ioctl should return an
> >>>>>>>>>>> accurate file number at end of data.  e.g., on the LTO-5:
> >>>>>>>>>>> 
> >>>>>>>>>>> [root_at_doc ~]# mt ostatus
> >>>>>>>>>>> Mode      Density              Blocksize      bpi      Compression
> >>>>>>>>>>> Current:  0x58:LTO-5           variable       384607   0x1
> >>>>>>>>>>> ---------available modes---------
> >>>>>>>>>>> 0:        0x58:LTO-5           variable       384607   0x1
> >>>>>>>>>>> 1:        0x58:LTO-5           variable       384607   0x1
> >>>>>>>>>>> 2:        0x58:LTO-5           variable       384607   0x1
> >>>>>>>>>>> 3:        0x58:LTO-5           variable       384607   0x1
> >>>>>>>>>>> ---------------------------------
> >>>>>>>>>>> Current Driver State: at rest.
> >>>>>>>>>>> ---------------------------------
> >>>>>>>>>>> File Number: 2  Record Number: -1       Residual Count -1
> >>>>>>>>>>> 
> >>>>>>>>>>> So the thing to try, in addition to just making sure that Bacula continues
> >>>>>>>>>>> to work properly, is to try setting this for the tape drive in
> >>>>>>>>>>> bacula-sd.conf:
> >>>>>>>>>>> 
> >>>>>>>>>>> Hardware End of Medium = yes
> >>>>>>>>>>> 
> >>>>>>>>>>> It looks like the Bacula tape program (btape) has a test mode, and it would
> >>>>>>>>>>> be good to run through the tests on one of the tape drives and see whether
> >>>>>>>>>>> they work, and whether the results are different before and after the
> >>>>>>>>>>> changes.  I'm not sure how to enable the test mode.
> >>>>>>>>>> 
> >>>>>>>>>> I have this in /usr/local/etc/bacula/bacula-sd.conf
> >>>>>>>>>> 
> >>>>>>>>>> Device {
> >>>>>>>>>> Name                    = DLT
> >>>>>>>>>> Description             = "QUANTUM DLT7000 1624"
> >>>>>>>>>> Media Type              = DLT
> >>>>>>>>>> Archive Device          = /dev/nsa1
> >>>>>>>>>> 
> >>>>>>>>>> Autochanger             = YES
> >>>>>>>>>> Drive Index             = 0
> >>>>>>>>>> 
> >>>>>>>>>> Offline On Unmount      = no
> >>>>>>>>>> Hardware End of Medium  = yes
> >>>>>>>>>> BSF at EOM              = yes
> >>>>>>>>>> Backward Space Record   = no
> >>>>>>>>>> Fast Forward Space File = no
> >>>>>>>>>> TWO EOF                 = yes
> >>>>>>>>>> }
> >>>>>>>>>> 
> >>>>>>>>>> FYI, http://www.freebsddiary.org/digital-tl891.php (from 2006) has a btape test on this same model.
> >>>>>>>>>> 
> >>>>>>>>>> Here's the test I ran tonight:
> >>>>>>>>>> 
> >>>>>>>>>> [root_at_cuppy:/usr/home/dan] # btape -c /usr/local/etc/bacula/bacula-sd.conf /dev/nsa1                                                                                                
> >>>>>>>>>> Tape block granularity is 1024 bytes.
> >>>>>>>>>> btape: butil.c:287-0 Using device: "/dev/nsa1" for writing.
> >>>>>>>>>> btape: btape.c:469-0 open device "DLT" (/dev/nsa1): OK
> >>>>>>>>>> *test
> >>>>>>>>>> 
> >>>>>>>>>> === Write, rewind, and re-read test ===
> >>>>>>>>>> 
> >>>>>>>>>> I'm going to write 10000 records and an EOF
> >>>>>>>>>> then write 10000 records and an EOF, then rewind,
> >>>>>>>>>> and re-read the data to verify that it is correct.
> >>>>>>>>>> 
> >>>>>>>>>> This is an *essential* feature ...
> >>>>>>>>>> 
> >>>>>>>>>> btape: btape.c:1152-0 Wrote 10000 blocks of 64412 bytes.
> >>>>>>>>>> btape: btape.c:604-0 Wrote 1 EOF to "DLT" (/dev/nsa1)
> >>>>>>>>>> btape: btape.c:1168-0 Wrote 10000 blocks of 64412 bytes.
> >>>>>>>>>> btape: btape.c:604-0 Wrote 1 EOF to "DLT" (/dev/nsa1)
> >>>>>>>>>> btape: btape.c:604-0 Wrote 1 EOF to "DLT" (/dev/nsa1)
> >>>>>>>>>> btape: btape.c:1210-0 Rewind OK.
> >>>>>>>>>> 10000 blocks re-read correctly.
> >>>>>>>>>> Got EOF on tape.
> >>>>>>>>>> 10000 blocks re-read correctly.
> >>>>>>>>>> === Test Succeeded. End Write, rewind, and re-read test ===
> >>>>>>>>>> 
> >>>>>>>>>> btape: btape.c:1277-0 Block position test
> >>>>>>>>>> btape: btape.c:1289-0 Rewind OK.
> >>>>>>>>>> Reposition to file:block 0:4
> >>>>>>>>>> Block 5 re-read correctly.
> >>>>>>>>>> Reposition to file:block 0:200
> >>>>>>>>>> Block 201 re-read correctly.
> >>>>>>>>>> Reposition to file:block 0:9999
> >>>>>>>>>> Block 10000 re-read correctly.
> >>>>>>>>>> Reposition to file:block 1:0
> >>>>>>>>>> Block 10001 re-read correctly.
> >>>>>>>>>> Reposition to file:block 1:600
> >>>>>>>>>> Block 10601 re-read correctly.
> >>>>>>>>>> Reposition to file:block 1:9999
> >>>>>>>>>> Block 20000 re-read correctly.
> >>>>>>>>>> === Test Succeeded. End Write, rewind, and re-read test ===
> >>>>>>>>>> 
> >>>>>>>>>> 
> >>>>>>>>>> 
> >>>>>>>>>> === Append files test ===
> >>>>>>>>>> 
> >>>>>>>>>> This test is essential to Bacula.
> >>>>>>>>>> 
> >>>>>>>>>> I'm going to write one record  in file 0,
> >>>>>>>>>>              two records in file 1,
> >>>>>>>>>>        and three records in file 2
> >>>>>>>>>> 
> >>>>>>>>>> btape: btape.c:574-0 Rewound "DLT" (/dev/nsa1)
> >>>>>>>>>> btape: btape.c:1907-0 Wrote one record of 64412 bytes.
> >>>>>>>>>> btape: btape.c:1909-0 Wrote block to device.
> >>>>>>>>>> btape: btape.c:604-0 Wrote 1 EOF to "DLT" (/dev/nsa1)
> >>>>>>>>>> btape: btape.c:1907-0 Wrote one record of 64412 bytes.
> >>>>>>>>>> btape: btape.c:1909-0 Wrote block to device.
> >>>>>>>>>> btape: btape.c:1907-0 Wrote one record of 64412 bytes.
> >>>>>>>>>> btape: btape.c:1909-0 Wrote block to device.
> >>>>>>>>>> btape: btape.c:604-0 Wrote 1 EOF to "DLT" (/dev/nsa1)
> >>>>>>>>>> btape: btape.c:1907-0 Wrote one record of 64412 bytes.
> >>>>>>>>>> btape: btape.c:1909-0 Wrote block to device.
> >>>>>>>>>> btape: btape.c:1907-0 Wrote one record of 64412 bytes.
> >>>>>>>>>> btape: btape.c:1909-0 Wrote block to device.
> >>>>>>>>>> btape: btape.c:1907-0 Wrote one record of 64412 bytes.
> >>>>>>>>>> btape: btape.c:1909-0 Wrote block to device.
> >>>>>>>>>> btape: btape.c:604-0 Wrote 1 EOF to "DLT" (/dev/nsa1)
> >>>>>>>>>> btape: btape.c:604-0 Wrote 1 EOF to "DLT" (/dev/nsa1)
> >>>>>>>>>> btape: btape.c:469-0 open device "DLT" (/dev/nsa1): OK
> >>>>>>>>>> btape: btape.c:574-0 Rewound "DLT" (/dev/nsa1)
> >>>>>>>>>> btape: btape.c:1420-0 Now moving to end of medium.
> >>>>>>>>> 
> >>>>>>>>> This is the critical piece.  The test moves the tape to the end of the
> >>>>>>>>> medium.  With hardware position information, you can tell what filemark
> >>>>>>>>> you're on.  Without it, you can't.
> >>>>>>>>> 
> >>>>>>>>>> btape: btape.c:622-0 tape_dev.c:345 ioctl MTIOCGET error on "DLT" (/dev/nsa1). ERR=No error: 0.
> >>>>>>>>>> We should be in file 3. I am at file 0. This is NOT correct!!!!
> >>>>>>>>>> 
> >>>>>>>>>> Append test failed. Attempting again.
> >>>>>>>>>> Setting "Hardware End of Medium = no
> >>>>>>>>>> and "Fast Forward Space File = no
> >>>>>>>>>> and retrying append test.
> >>>>>>>>> 
> >>>>>>>>> This is not surprsing, given that the drive doesn't support long read
> >>>>>>>>> position data.  (It's a SCSI-2 device.)  So that means that Bacula will
> >>>>>>>>> need to do it manually.
> >>>>>>>> 
> >>>>>>>> Yes, I have nothing newer than SCSI-2.  Even my SDLT is SCSI-2 but that
> >>>>>>>> tape library is hooked up to a different computer and was doing backups today.
> >>>>>>> 
> >>>>>>> So, here is one thing that we can try to see whether these drives support
> >>>>>>> long position information, even though they only claim to be SCSI-2.  If
> >>>>>>> they do, we can potentially add a quirk (or autodetection) to enable it.
> >>>>>>> The code currently doesn't bother asking drives that claim to be SCSI-2
> >>>>>>> for long position information.  (Because that feature was added in the
> >>>>>>> SSC spec, which came after SCSI-2.)
> >>>>>>> 
> >>>>>>> Issue a READ POSITION with the short form specified:
> >>>>>>> 
> >>>>>>> camcontrol cmd sa1 -v -c "34 0 0 0 0 0 0 0 0 0" -i 20 - |hd
> >>>>>>> 
> >>>>>>> Issue a READ POSITION with the vendor-specific block numbers:
> >>>>>>> 
> >>>>>>> camcontrol cmd sa1 -v -c "34 1 0 0 0 0 0 0 0 0" -i 20 - |hd
> >>>>>>> 
> >>>>>>> Issue a READ POSITION with the long form data:
> >>>>>>> 
> >>>>>>> camcontrol cmd sa1 -v -c "34 6 0 0 0 0 0 0 0 0" -i 32 - |hd
> >>>>>>> 
> >>>>>>> If it supports the last one, then I can put a quirk (or autodetection) in
> >>>>>>> the driver and Bacula will get the hardware filemarks.  You should try this
> >>>>>>> on your SDLT as well.  It may well support it.
> >>>>>> 
> >>>>>> Sadly, no:
> >>>>>> 
> >>>>>> [root_at_cuppy:~] # camcontrol cmd sa1 -v -c "34 0 0 0 0 0 0 0 0 0" -i 20 - |hd
> >>>>>> 00000000  80 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
> >>>>>> 00000010  00 00 00 00                                       |....|
> >>>>>> 00000014
> >>>>>> [root_at_cuppy:~] # camcontrol cmd sa1 -v -c "34 1 0 0 0 0 0 0 0 0" -i 20 - |hd
> >>>>>> 00000000  80 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
> >>>>>> 00000010  00 00 00 00                                       |....|
> >>>>>> 00000014
> >>>>>> [root_at_cuppy:~] # camcontrol cmd sa1 -v -c "34 6 0 0 0 0 0 0 0 0" -i 32 - |hd
> >>>>>> camcontrol: error sending command
> >>>>>> (pass2:ahc0:0:2:0): READ POSITION. CDB: 34 06 00 00 00 00 00 00 00 00 
> >>>>>> (pass2:ahc0:0:2:0): CAM status: SCSI Status Error
> >>>>>> (pass2:ahc0:0:2:0): SCSI status: Check Condition
> >>>>>> (pass2:ahc0:0:2:0): SCSI sense: ILLEGAL REQUEST asc:24,0 (Invalid field in CDB)
> >>>>>> (pass2:ahc0:0:2:0): Command byte 1 bit 2 is invalid
> >>>>>> [root_at_cuppy:~] # 
> >>>>> 
> >>>>> Okay.  Not too surprising I suppose.
> >> 
> >> 
> >> Does this mean much to you?
> >> 
> >> Mar  2 19:42:59 cuppy kernel: (ahc0:A:2:0): Sending SDTR period 19, offset f
> >> Mar  2 19:42:59 cuppy kernel: (ahc0:A:2:0): Received SDTR period 19, offset f
> >> Mar  2 19:42:59 cuppy kernel: Filtered to period 19, offset f
> >> Mar  2 19:42:59 cuppy kernel: (ahc0:A:2:0): Sending SDTR period 19, offset f
> >> Mar  2 19:42:59 cuppy kernel: (ahc0:A:2:0): Received SDTR period 19, offset f
> >> Mar  2 19:42:59 cuppy kernel: Filtered to period 19, offset f
> >> Mar  2 19:42:59 cuppy kernel: (ahc0:A:2:0): Sending SDTR period 19, offset f
> >> Mar  2 19:42:59 cuppy kernel: (ahc0:A:2:0): Received SDTR period 19, offset f
> >> Mar  2 19:42:59 cuppy kernel: Filtered to period 19, offset f
> >> 
> >> 
> >> I'm having trouble with labeling barcodes from Bacula and the above is seen in /var/log/messages
> > 
> > The barcodes issue is resolved.  I changed to using drive 0 instead of drive 1, now that we have both drives.
> > 
> > *label barcodes slots=3,4
> > The defined Storage resources are:
> >     1: File1
> >     2: OldTL891
> > Select Storage resource (1-2): 2
> > Connecting to Storage daemon OldTL891 at 10.55.0.18:9103 ...
> > 3306 Issuing autochanger "slots" command.
> > Device "DTL03" has 10 slots.
> > Connecting to Storage daemon OldTL891 at 10.55.0.18:9103 ...
> > 3306 Issuing autochanger "list" command.
> > The following Volumes will be labeled:
> > Slot  Volume
> > ==============
> >   3  FAI261
> >   4  FAI262
> > Do you want to label these Volumes? (yes|no): yes
> > Defined Pools:
> >     1: Default
> >     2: File
> >     3: MYDLT
> >     4: Scratch
> > Select the Pool (1-4): 4
> > Connecting to Storage daemon OldTL891 at 10.55.0.18:9103 ...
> > Sending label command for Volume "FAI261" Slot 3 ...
> > 3000 OK label. VolBytes=64512 DVD=0 Volume="FAI261" Device="DTL03" (/dev/nsa0)
> > Catalog record for Volume "FAI261", Slot 3  successfully created.
> > Sending label command for Volume "FAI262" Slot 4 ...
> > 3307 Issuing autochanger "unload slot 3, drive 0" command.
> > 3304 Issuing autochanger "load slot 4, drive 0" command.
> > 3305 Autochanger "load slot 4, drive 0", status is OK.
> > 3000 OK label. VolBytes=64512 DVD=0 Volume="FAI262" Device="DTL03" (/dev/nsa0)
> > Catalog record for Volume "FAI262", Slot 4  successfully created.
> > *list volumes
> > Pool: Default
> > No results to list.
> > Pool: File
> > +---------+------------+-----------+---------+------------+----------+--------------+---------+------+-----------+-----------+---------------------+
> > | mediaid | volumename | volstatus | enabled | volbytes   | volfiles | volretention | recycle | slot | inchanger | mediatype | lastwritten         |
> > +---------+------------+-----------+---------+------------+----------+--------------+---------+------+-----------+-----------+---------------------+
> > |       1 | Vol-0001   | Append    |       1 | 19,835,982 |        0 |   31,536,000 |       1 |    0 |         0 | File1     | 2015-03-02 17:50:40 |
> > |       2 | Vol-0002   | Append    |       1 |          0 |        0 |   31,536,000 |       1 |    0 |         0 | DLT       |                     |
> > +---------+------------+-----------+---------+------------+----------+--------------+---------+------+-----------+-----------+---------------------+
> > Pool: MYDLT
> > No results to list.
> > Pool: Scratch
> > +---------+------------+-----------+---------+----------+----------+--------------+---------+------+-----------+-----------+-------------+
> > | mediaid | volumename | volstatus | enabled | volbytes | volfiles | volretention | recycle | slot | inchanger | mediatype | lastwritten |
> > +---------+------------+-----------+---------+----------+----------+--------------+---------+------+-----------+-----------+-------------+
> > |       4 | FAI260     | Append    |       1 |   64,512 |        0 |   31,536,000 |       1 |    1 |         1 | DLT       |             |
> > |       5 | FAI263     | Append    |       1 |   64,512 |        0 |   31,536,000 |       1 |    2 |         1 | DLT       |             |
> > |       7 | FAI261     | Append    |       1 |   64,512 |        0 |   31,536,000 |       1 |    3 |         1 | DLT       |             |
> > |       8 | FAI262     | Append    |       1 |   64,512 |        0 |   31,536,000 |       1 |    4 |         1 | DLT       |             |
> > +---------+------------+-----------+---------+----------+----------+--------------+---------+------+-----------+-----------+-------------+
> > *
> > 
> > But this is what arrives in /var/log/messages during the above:
> > 
> > Mar  2 20:29:06 cuppy kernel: (ahc0:A:1:0): Sending SDTR period 19, offset f
> > Mar  2 20:29:06 cuppy kernel: (ahc0:A:1:0): Received SDTR period 19, offset f
> > Mar  2 20:29:06 cuppy kernel: Filtered to period 19, offset f
> > Mar  2 20:30:22 cuppy kernel: (ahc0:A:1:0): Sending SDTR period 19, offset f
> > Mar  2 20:30:22 cuppy kernel: (ahc0:A:1:0): Received SDTR period 19, offset f
> > Mar  2 20:30:22 cuppy kernel: Filtered to period 19, offset f
> > Mar  2 20:30:22 cuppy kernel: (ahc0:A:1:0): Sending SDTR period 19, offset f
> > Mar  2 20:30:22 cuppy kernel: (ahc0:A:1:0): Received SDTR period 19, offset f
> > Mar  2 20:30:22 cuppy kernel: Filtered to period 19, offset f
> > Mar  2 20:30:59 cuppy kernel: (ahc0:A:1:0): Sending SDTR period 19, offset f
> > Mar  2 20:30:59 cuppy kernel: (ahc0:A:1:0): Received SDTR period 19, offset f
> > Mar  2 20:30:59 cuppy kernel: Filtered to period 19, offset f
> > Mar  2 20:30:59 cuppy kernel: xpt_release_devq(): requested 1 > present 0
> > Mar  2 20:31:07 cuppy kernel: (ahc0:A:1:0): Sending SDTR period 19, offset f
> > Mar  2 20:31:07 cuppy kernel: (ahc0:A:1:0): Received SDTR period 19, offset f
> > Mar  2 20:31:07 cuppy kernel: Filtered to period 19, offset f
> > 
> > Anything to be concerned about?
> 
> When adding a 2nd job to a tape:
> 
> 02-Mar 21:29 cuppy-sd JobId 19: Error: Unable to position to end of data on tape device "DTL03" (/dev/nsa0): ERR=tape_dev.c:345 ioctl MTIOCGET error on "DTL03" (/dev/nsa0). ERR=No error: 0.
> 
> I've gotten this on three consecutive tapes.  NOTE: These *are* tapes I no longer use because of higher rates of corrected errors.
> 
> The problem seems to be locating the end of the data.

Do you have 'Hardware End of Medium  = no' in the configuration file?

In looking at the code, it may be set to yes, and that could be the issue
here.

> 
> I can run a 4 or 5 jobs in a row, but if I restore a job, then add a job, it fails with the above message.
> 

I would expect that on these particular tape drives because they don't
support long position information.

Ken
-- 
Kenneth Merry
ken_at_FreeBSD.ORG
Received on Mon Mar 02 2015 - 20:42:44 UTC

This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:40:56 UTC