Re : Raw device questions

> From: Eddie Roberts <nws@stout.atd.ucar.edu> > Message-Id: <58kgil$22d@ncar.ucar.edu> > Subject: Raw device questions... OR Tech support says we are wrong > Date: 10 Dec 1996 20:18:29 GMT > Reply-To: Eddie Roberts <nws@stout.atd.ucar.edu> > Organization: NCAR > Sender: informix-list-owner@rmy.emory.edu > To: informix-list@rmy.emory.edu > X-Informix-List-To: dhlinfmx@dhl.com > X-Informix-List-Id: <news.31498> > Status: R > > I've been following the numerous threads about setting up an Informix > database (v7.20UC2) on a HP workstation (J200 running hpux 10.20) and > was hoping someone has the definitive answer to the question: > > "Do you need to specify an offset into a logical > volume when using the logical volume managers raw > device (ie. rlvolN)?" > > OR > > "Does HP-UX write partition (ie logical volume) information > or disk drive information on the drive that could be destroyed > when using the raw device driver (ie. rlvolN)?" > > HP tech support said absolutely not!! > > Informix tech support said this was dependent on the OS and the way the > OS manages disk drives and partitions. > > Now, I'm a little confused and a lot nervous!!!! The tech support from both > companies said no offset is needed in the raw disk partition when using > the LVM's character device driver under HP-UX 10.20, BUT I've read several > posts where DBAs have destroyed their disks under this scenario. > > HELP!!!!!!!! > Eddie We had the same problem recently when we upgraded from HPUX 10.01 to 10.10 on a K200, which destroyed the root disk and lvol information. We had 2 TBCONFIGs. The first TBCONFIG have mirrored root, one of which was in the root disk which was "destroyed" in the upgrade. When the system was restored, we could not bring up the database. We were wondering whether Informix mirroring was working. On the 2nd config, no chunks were on the root disk. It couldn't come up either. However when we dd the first 100K from a copy of the chunk that was taken before the upgrade, the engine came up ! A comparison of the data from the 2 chunks revealed some differences. The HP engineer again said nothing was written on to the disk... The log was as follows. Sun Dec 8 17:30:24 1996 17:30:24 Cannot Open Primary Chunk '/dev/rtzeusdb2', errno = 2 17:30:25 I/O open() chunk 1, pagenum 0, pagecnt 1 --> errno = 2 17:30:25 INFORMIX-OnLine Must ABORT Root chunk down. 17:30:25 -- Online Aborting -- us=c0852128, pid=2764, uid=200 17:30:25 Unable to create output file '/tmp/infx_dump/shmem.2764.ABORT' errno = 2 17:30:25 Error writing shmem to file /tmp/infx_dump/shmem.2764.ABORT. (OnLine Abort) 17:30:25 INFORMIX-OnLine Stopped Sun Dec 8 17:32:29 1996 17:32:29 Cannot Open Primary Chunk '/dev/rtzeusdb2', errno = 2 17:32:29 I/O open() chunk 1, pagenum 0, pagecnt 1 --> errno = 2 17:32:29 INFORMIX-OnLine Must ABORT Root chunk down. 17:32:29 -- Online Aborting -- us=c0852128, pid=3023, uid=200 17:32:29 Unable to create output file '/tmp/infx_dump/shmem.3023.ABORT' errno = 2 17:32:29 Error writing shmem to file /tmp/infx_dump/shmem.3023.ABORT. (OnLine Abort) 17:32:29 INFORMIX-OnLine Stopped Sun Dec 8 17:34:43 1996 17:34:43 Cannot Open Primary Chunk '/dev/zeusdb2', errno = 2 17:34:43 Cannot Open Primary Chunk '/dev/lgzeusdb2', errno = 2 17:34:43 I/O open() chunk 2, pagenum 4, pagecnt 1 --> errno = 2 17:34:43 tblspace header error: 17:34:43 c094f060: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f070: 00000001 00000000 00000000 00010000 ........ ........ 17:34:43 c094f080: 02000001 00200004 00000000 00000000 ..... .. ........ 17:34:43 c094f090: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f0a0: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f0b0: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f0c0: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f0d0: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f0e0: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f0f0: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f100: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f110: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f120: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f130: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f140: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f150: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f160: c09915e0 01532776 00000000 c0995460 .....S'v ......T` 17:34:43 -- Fail Consistency Check -- pthdrpage:ptalloc:bad bfget -- pid=3318 user=200 us=c0852128 17:34:43 Unable to create output file '/tmp/infx_dump/shmem.3318.1' errno = 2 17:34:43 Error writing shmem to file /tmp/infx_dump/shmem.3318.1. (pthdrpage:ptalloc:bad bfget) 17:34:43 Cannot Open Dbspace 2 17:34:43 I/O open() chunk 3, pagenum 4, pagecnt 1 --> errno = 2 17:34:43 tblspace header error: 17:34:43 c094f060: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f070: 00000001 00000000 00000000 00010000 ........ ........ 17:34:43 c094f080: 03000001 00300004 00000000 00000000 .....0.. ........ 17:34:43 c094f090: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f0a0: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f0b0: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f0c0: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f0d0: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f0e0: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f0f0: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f100: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f110: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f120: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f130: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f140: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f150: 00000000 00000000 00000000 00000000 ........ ........ 17:34:43 c094f160: c09915e0 01532776 00000000 c0995460 .....S'v ......T` 17:34:43 -- Fail Consistency Check -- pthdrpage:ptalloc:bad bfget -- pid=3318 user=200 us=c0852128 17:34:43 Unable to create output file '/tmp/infx_dump/shmem.3318.2' errno = 2 17:34:43 Error writing shmem to file /tmp/infx_dump/shmem.3318.2. (pthdrpage:ptalloc:bad bfget) 17:34:43 Cannot Open Dbspace 3 17:34:43 INFORMIX-OnLine Initialized -- Shared Memory Initialized 17:34:43 Physical Recovery Started 17:34:43 Checkpoint Completed 17:34:43 Physical Recovery Complete: 0 Pages Restored 17:34:43 Cannot Read Logical Log 17:34:43 Cannot Rollforward from Checkpoint 17:34:43 INFORMIX-OnLine Stopped The disk config is as follows : Chunks address chk/dbs offset size free bpages flags pathname c16cca50 1 1 0 60000 54778 PO-