topic Re: Backup saveset problem in NFS device in Operating System - OpenVMS

Backup saveset problem in NFS device

IFX_1 — Tue, 30 Jun 2009 06:13:32 GMT

Our System:
===========
OpenVMS 8.3-1H1 on Rx2660.

Two processes were performed:

1st:
- Backup local disk and output the saveset to another local disk.
- Backup /list confirms a good saveset.
- COPY the backup saveset to NFS mounted device

2nd:
- BACKUP local disk and output the saveset directly to the NFS mounted device.

The backup saveset size from output of 1st step above is around 138M blocks.

Mounting Method:
================
$tcpip mount dnfsxx:/host="hostname"/path=""/server_type=unix/convert/adf=create

The problem:
============
- After copy/backup of the saveset into the NFS device, the saveset file size drops from 138M blocks to around ???M blocks.

===========================
COPY saveset to NFS device
===========================
$ dir DISK$I64SYS.BCK
Directory DKA800:[BACKUP]

DISK$I64SYS.BCK;1 *******/******* 29-JUN-2009 10:39:14.91

Total of 1 file, 137973339/137973344 blocks.

$ copy/log DISK$I64SYS.BCK DNFS88:[BACKUP]
HOST::SYSTEM 14:28:01 COPY CPU=00:00:48.34 PF=2578 IO=1806760 MEM=290
Copying: DKA800:[BACKUP]DISK$I64SYS.BCK;1 (81% completed) 111833244 blocks copied of 137973339
%COPY-S-COPIED, DKA800:[BACKUP]DISK$I64SYS.BCK;1 copied to DNFS88:[BACKUP]DISK$I64SYS.BCK;1 (137973339 blocks)

====================================
Saveset in NFS device – ONGOING COPY
NOTE: File allocation is as per original size
====================================
$ DIR .BCK
Directory DNFS88:[BACKUP]

DISK$I64SYS.BCK;1 0/******* 29-JUN-2009 10:39:14.91

Total of 1 file, 0/137973339 blocks.

=======================================
Saveset in NFS device – COPY COMPLETED
=======================================
$ dir .bck

Directory DNFS88:[000000.BACKUP]

DISK$I64SYS.BCK;1 3755611/3755611 29-JUN-2009 10:39:14.91 [3375,1]

Total of 1 file, 3755611/3755611 blocks.

- BACKUP/LIST produces the following error

$ back/list DISK$I64SYS.BCK /save
Listing of save set(s)

%BACKUP-E-READERRS, excessive error rate reading DNFS88:[000000.BACKUP]DISK$I64SYS.BCK;1
-BACKUP-E-BLOCKCRC, software block CRC error
%BACKUP-I-OPERSPEC

Re: Backup saveset problem in NFS device

marsh_1 — Tue, 30 Jun 2009 08:23:55 GMT

hi,

if you do a dir/full on both savesets what other differences are there ?

Re: Backup saveset problem in NFS device

IFX_1 — Tue, 30 Jun 2009 08:41:10 GMT

LOCAL:

$ dir /full DISK$I64SYS.BCK

Directory DKA800:[BACKUP]

DISK$I64SYS.BCK;1 File ID: (4082,2,0)
Size: 137973339/137973344 Owner: [SYSTEM]
Created: 29-JUN-2009 10:39:14.91
Revised: 30-JUN-2009 10:38:59.94 (1)
Expires:
Backup:
Effective:
Recording:
Accessed:
Attributes:
Modified:
Linkcount: 1
File organization: Sequential
Shelved state: Online
Caching attribute: No_caching
File attributes: Allocation: 137973344, Extend: 0, Global buffer count: 0
No version limit
Record format: Fixed length 32256 byte records
Record attributes: None
RMS attributes: None
Journaling enabled: None
File protection: System:RWED, Owner:RWED, Group:RE, World:
Access Cntrl List: None
Client attributes: None

Total of 1 file, 137973339/137973344 blocks.

NFS:

Directory DNFS88:[BACKUP]

DISK$I64SYS.BCK;1 File ID: (13,15712,0)
Size: 3755611/3755611 Owner: [3375,1]
Created: 29-JUN-2009 10:39:14.91
Revised: 30-JUN-2009 15:04:43.61 (2)
Expires:
Backup:
Effective:
Recording:
Accessed:
Attributes:
Modified:
Linkcount: 1
File organization: Sequential
Shelved state: Online
Caching attribute: No_caching
File attributes: Allocation: 3755611, Extend: 0, Global buffer count: 0
No version limit
Record format: Fixed length 32256 byte records
Record attributes: None
RMS attributes: None
Journaling enabled: None
File protection: System:RWED, Owner:RWED, Group:RE, World:
Access Cntrl List: None
Client attributes: None

Total of 1 file, 3755611/3755611 blocks.

Re: Backup saveset problem in NFS device

Shriniketan Bhagwat — Wed, 01 Jul 2009 10:02:30 GMT

Hi,

A possibility for the corruption of the backup saveset is change of attributes due to transfer over a network. In this case attributes can be reset to the original ones by running the following command
procedure from the VMS Freeware.

$ @RESET_BACKUP_SAVESET_FILE_ATTRIBUTES.COM

-Ketan

Re: Backup saveset problem in NFS device

The Brit — Wed, 01 Jul 2009 10:12:41 GMT

What was the specific backup command used, and was it the same in both cases???

Dave.

Re: Backup saveset problem in NFS device

Jur van der Burg — Wed, 01 Jul 2009 11:15:18 GMT

You don't mention what kind of NFS server we're talking about. This is clearly an issue with either the NFS client on VMS or the NFS server.

Now, 137973339 blocks = 70642349568 bytes or about 70GB. And 3755611 blocks = 1922872832 or about 2GB. So is the NFS server capable of handling files more than 2GB? Or tcpip services? I seem to remember that tcpip services for vms does only NFS V2 protocol which limits the filesize to 32bits. But that may be fixed by now.

Jur.

Re: Backup saveset problem in NFS device

IFX_1 — Thu, 02 Jul 2009 01:49:15 GMT

Thanks you guys for the response.

It seems like this is a limitation of the NFS server running on 32-bit system.

Re: Backup saveset problem in NFS device

Ananth S — Thu, 02 Jul 2009 05:00:01 GMT

NFS client on OpenVMS (TCP/IP services) supports only NFS v2 protocol where file sizes of upto 4GB are supported.