Hi,

I get read errors and restore takes very very long or get aborted,
There were no write errors during backup.  What could be reason?  How
can I do tape
drive cleaning using cleaning tape from Networker?

--------
11627 04/23/2011 10:57:11 AM  0 0 2 2863594064 4212 0 backup_db nsrd
DRDB1:oracle browsing
11627 04/23/2011 10:57:11 AM  0 0 2 2863594064 4212 0 backup_db nsrd
DRDB1:oracle browsing
38742 04/23/2011 10:58:51 AM  0 0 2 2863594064 4212 0 backup_db nsrd
db1:RMAN:_749131206_498_1_KAU11PUB (4/22/11) starting read from AAD028
of 27 GB
38742 04/23/2011 10:58:51 AM  0 0 2 2863594064 4212 0 backup_db nsrd
db1:RMAN:_749131206_499_1_KAU11PUB (4/22/11) starting read from AAD028
of 27 GB
38758 04/23/2011 11:17:00 AM  2 0 0 2863594064 4212 0 backup_db nsrd
media warning: /dev/nst0 reading: Input/output error
42506 04/23/2011 12:00:00 PM  2 0 0 2863594064 4212 0 backup_db nsrd
savegroup info: skipped starting KAU11PUB1_ORCL_LEVEL0
38758 04/23/2011 12:24:13 PM  2 0 0 2863594064 4212 0 backup_db nsrd
media warning: /dev/nst0 reading: Input/output error
38758 04/23/2011 01:32:30 PM  2 0 0 2863594064 4212 0 backup_db nsrd
media warning: /dev/nst0 reading: Input/output error
38758 04/23/2011 01:47:40 PM  2 0 0 2863594064 4212 0 backup_db nsrd
media warning: /dev/nst0 reading: Input/output error
38758 04/23/2011 02:07:42 PM  2 0 0 2863594064 4212 0 backup_db nsrd
media warning: /dev/nst0 reading: Input/output error
38732 04/23/2011 02:19:40 PM  0 0 2 2863594064 4212 0 backup_db nsrd
db1:RMAN:_749131206_498_1_KAU11PUB (4/22/11) done reading 27 GB
38732 04/23/2011 02:19:42 PM  0 0 2 2863594064 4212 0 backup_db nsrd
db1:RMAN:_749131206_499_1_KAU11PUB (4/22/11) done reading 27 GB
11625 04/23/2011 02:30:35 PM  0 0 2 2863594064 4212 0 backup_db nsrd
DRDB1:oracle done browsing
11627 04/23/2011 02:30:43 PM  0 0 2 2863594064 4212 0 backup_db nsrd
DRDB1:oracle browsing
38742 04/23/2011 02:30:44 PM  0 0 2 2863594064 4212 0 backup_db nsrd
db1:RMAN:_749131206_500_1_KAU11PUB (4/22/11) starting read from AAD028
of 33 GB
11625 04/23/2011 02:31:08 PM  0 0 2 2863594064 4212 0 backup_db nsrd
DRDB1:oracle done browsing
11627 04/23/2011 02:31:20 PM  0 0 2 2863594064 4212 0 backup_db nsrd
DRDB1:oracle browsing
38742 04/23/2011 02:31:25 PM  0 0 2 2863594064 4212 0 backup_db nsrd
db1:RMAN:_749131206_497_1_KAU11PUB (4/22/11) starting read from AAD028
of 37 GB
38758 04/23/2011 03:21:30 PM  2 0 0 2863594064 4212 0 backup_db nsrd
media warning: /dev/nst0 reading: Input/output error

-------

Also I see that tapes are marked full much before it reaches capacity,
what could be the reason?.  I am using LTO4 tapes:

------
38758 04/24/2011 05:27:43 PM  2 0 0 2863594064 4212 0 backup_db nsrd
media warning: /dev/nst1 writing: Input/output error, at file 192
record 13255
42506 04/24/2011 05:27:43 PM  2 0 0 2863594064 4212 0 backup_db nsrd
media notice: LTO Ultrium-4 tape AAD032 on /dev/nst1 is full
42506 04/24/2011 05:27:43 PM  2 0 0 2863594064 4212 0 backup_db nsrd
media notice: LTO Ultrium-4 tape AAD032 used 105 GB of 800 GB capacity
42506 04/24/2011 05:27:46 PM  2 0 0 2863594064 4212 0 backup_db nsrd
media info: WORM capable for device /dev/nst1 has been set
42506 04/24/2011 05:28:02 PM  2 0 0 2863594064 4212 0 backup_db nsrd
media info: WORM capable for device /dev/nst1 has been set
------

I am using the following:
Backup Software:
EMC Networker 7.5.1 Build 269
Networker Module for Oracle 4.5

Backup Hardware:
Tape Library: FibreCAT TX48 with 2 LTO4 Drives and 12 slots (1 slot
dedicated for cleaning tape).  (firmware upgraded to latest).

Backup Server:
OS: Redhat Enterprise Linux 5.1

I need your help on this at the earliest.  Thanks in advance.

Regards,
Subin Hameed

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