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- From: mfaurot@bogart.uucp (Michael Faurot)
- Newsgroups: comp.databases.informix,comp.sys.ibm.pc.rt
- Subject: tbtape problems with OnLine & IBM RT
- Summary: can't back-up OnLine partitions
- Message-ID: <1993Jan4.133248.23167@bogart.uucp>
- Date: 4 Jan 93 13:32:48 GMT
- Followup-To: comp.databases.informix
- Organization: ism:c:m/xo
- Lines: 78
-
-
- Several weeks ago I posted the message you'll find below. I received one
- follow-up post from David Kosenko (davek@informix.com) which provided a
- means of being able to get back at the database by changing the value of the
- MIRROR parameter in the tbconfig file from 0 to 1. David further suggested
- the problem was likely due to bad blocks on the physical device and a low
- level format should be performed to attempt to lock out the bad blocks.
-
- Initially I was of the opinion that bad blocks were not the problem as I was
- able to read the entire raw patition via the dd command without any read
- errors. But just to satisfy myself, I went ahead and did the low level on
- the device, and the problem still remains. The device is an external IBM
- 9332 style 200M SCSI device. I have partitions all over the drive and have
- NEVER had any read errors of any kind with any of the AIX (ie, regular)
- partitons. I've further tried shuffling the OnLine partiton to different
- areas on the hard disk and the problem still remains. I feel very confident
- at this point there are no physical problems such as bad blocks on this disk
- drive which would cause OnLine to barf.
-
- At this point in time I find OnLine to be utterly worthless to me. If I
- can't back-up my data then the product is useless to me.
-
- Is this a known bug in this release/port of OnLine? Is there a fix or
- update for it?
-
-
- Here follows the text of my original post and problem:
-
- ==============================================================================
-
- Have the following hardware, OS, and Informix . . .
-
- IBM RT
- AIX 2.2.1
- Informix OnLine v4.00.UD4
-
- Here's the problem . . .
-
- After initializing rootdbs and shared memory without any
- difficulties I use ISQL to create a couple of databases, fill
- one of them up with records and the other is simply empty.
-
- Now I wish to back-up this entire configuration to tape. So I
- use the Archive option from within tbmonitor. I then choose
- the option to Create, mount the tape in the drive, select "0"
- for a level 0 archive and then receive the following error
- message:
-
- Error reading from the disk, Error No. = 5.
-
- If I don't shutdown OnLine, I can still access the databases
- but if I do shutdown OnLine, I get the following error messages
- when I attempt to bring it back up:
-
- Bad Primary Chunk '/dev/rootdbs'
- tbinit: fatal error in shared memory initialization
-
- I'm fairly certain there's nothing wrong with the tape
- perameters I'm using because, oddly enough, if I only create
- the first database, I can back-up the system without it
- corrupting the rootdbs. It's only after I add the second
- database and attempt to back it up that it trashes rootdbs.
-
- If I make no attempts to back-up the OnLine partitions, OnLine
- goes up and down just fine.
-
- Has anyone run into this before? Know a fix? Could this be related
- to improper setting for shared memory and semaphores? If related to
- shared memory etc., could someone please email me either their
- /etc/master file or the relavent stanzas from it?
-
- Thanks.
- --
-
- +--------------------+-------------------------------------------------------+
- | Michael Faurot | Domain: mfaurot@bogart.UUCP |
- | ------- ------ | UUCP: ...{irscscm|mimsy}!bogart!mfaurot |
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