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RE: Temporary tape errors



fixed

I'd be after those write errors in a real hurry. That means you may, or may
not, have everything on tape successfully. Temporary errors indicate there
is a problem with the drive or tape. Replace the tape with a new one first,
still getting write errors, replace the drive. Either way I would not trust
the backups with these numbers.

--
Jim Oberholtzer
Chief Technical Architect
Agile Technology Architects


-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Joe Wood
Sent: Tuesday, March 04, 2014 9:47 AM
To: Midrange Systems Technical Discussion
Subject: Re: Temporary tape errors

Jeff,

On two different aged 520's, both with 6384 QIC internal drives, lifetime
reports:

V5R4
Volume ---Temporary Errors--- --------M Bytes--------
ID Read Write Read Written
******** 1 0 1 1
15 0 1 1
SAVSYS 113 159244 1 41028
IBMIRD 358 2221075 222 718707


V7R1
Volume ---Temporary Errors--- --------M Bytes--------
ID Read Write Read Written
0 100 1 1
BACKUP 34 265772 1 62356
SAVSYS 238 434215 1 348448
CUWCD1 0 2550 1 27035
FIN 0 108 1 1714
#SAVE 9 50972 1386 866727
BDATA2 0 0 1 9580
FDATA 0 0 1 9515
FULSAV 0 0 1 23446




On Tue, Mar 4, 2014 at 8:42 AM, Jeff Crosby
<jlcrosby@xxxxxxxxxxxxxxxx>wrote:

Thanks Scott. I hope other chime in.


On Tue, Mar 4, 2014 at 10:35 AM, Scott Mildenberger <
SMildenberger@xxxxxxxxxxxxxxxxxx> wrote:

Jeff,

We have an internal drive and the report shows lots of TTE's, I have
never
looked at this before so don't know if it has always been like this.
The report doesn't recommend replacing any media and we have not had
any
issues
restoring anything off tape.

Scott

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:
midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Jeff Crosby
Sent: Tuesday, March 04, 2014 6:51 AM
To: Midrange Systems Technical Discussion
Subject: Re: Temporary tape errors

I heard from my HW service provider this morning. They want to
replace the internal 5755 drive, a 'cage', and wiring harness I
think that's it, but he may have said something else. I asked
whether the replacement
drive
was tested and would eliminate the Temporary Tape Errors ("TTE" for
short).
They said it was tested, but no, the TTEs would not be eliminated.

I asked why should I change drives and still have TTEs? They said
this drive would have fewer errors. They have 15 systems in their
data center and every internal tape drive has TTEs. Customers with
internal tape drives also have TTEs. Systems with external tape
drives (data center
and
customers) don't have TTEs. Per them, TTEs on internal tape drives
is
the
norm.

This *really* bothers me to think that it's acceptable in the
midrange world to have TTEs on internal tape drives. I'm really
interested in whether anyone on this list that is using internal
tape drive for backup would check their *VOLSTATS via the PRTERRLOG
command and report.

I have yet to give them the OK to do this. When I do, I may say
that I want to do it Friday at 5pm so if there is a catastrophic
issue we have
the
weekend to recover. (The last time they replaced the internal tape
drive we lost a hard drive upon restart.) Maybe I'm overreacting,
but I am amazed at how much my confidence in the HW has been shaken
over the past couple of months.
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--
Jeff Crosby
VP Information Systems
UniPro FoodService/Dilgard
P.O. Box 13369
Ft. Wayne, IN 46868-3369
260-422-7531
www.dilgardfoods.com

The opinions expressed are my own and not necessarily the opinion of
my company. Unless I say so.
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--
----------------
Joe Wood
----------------

E: wood3875@xxxxxxxxx
M: 801-891-5223
L: http://www.linkedin.com/in/josephgwood
--
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