Hi please find attached logs below.

from alert log, it says;
"CRS-1006:The OCR location /opt/oracle/10.2.0.2/DB/cdata/localhost/local.ocr is inaccessible, Details in /opt/oracle/10.2.0.2/crs/log/..../client/clscfg_11155.log.
2008-04-10 15:13:34.258
[client(11155)]CRS-1006:The OCR location /opt/oracle/10.2.0.2/DB/cdata/localhost/local.ocr is inaccessible. Details in /opt/oracle/10.2.0.2/crs/log/zainbhmrdb1/client/clscfg_11155.log.

Details in /opt/oracle/10.2.0.2/crs/log/zainbhmrdb1/client/clscfg_11155.log:

Oracle Database 10g CRS Release 10.2.0.1.0 Production Copyright 1996, 2005 Oracle. All rights reserved.
2008-04-10 15:13:34.256: [ OCROSD][1]utread:3: problem reading buffer 2449000 buflen 512 retval 0 phy_offset 102400 retry 0
2008-04-10 15:13:34.257: [ OCROSD][1]utread:4: problem reading the buffer errno 2 errstring No such file or directory
2008-04-10 15:13:34.257: [ OCROSD][1]utread:3: problem reading buffer 244f000 buflen 4096 retval 0 phy_offset 102400 retry 0
2008-04-10 15:13:34.257: [ OCROSD][1]utread:4: problem reading the buffer errno 25 errstring Inappropriate ioctl for device
2008-04-10 15:13:34.257: [ OCRRAW][1]propriogid:1: INVALID FORMAT
2008-04-10 15:13:34.257: [ OCROSD][1]utread:3: problem reading buffer 244f000 buflen 4096 retval 0 phy_offset 102400 retry 0
2008-04-10 15:13:34.257: [ OCROSD][1]utread:4: problem reading the buffer errno 25 errstring Inappropriate ioctl for device
2008-04-10 15:13:34.257: [ OCRRAW][1]ibctx:1:ERROR: INVALID FORMAT
2008-04-10 15:13:34.257: [ OCRRAW][1]proprinitroblem reading the bootblock or superbloc 22

2008-04-10 15:13:34.257: [ default][1]a_init:7!: Backend init unsuccessful : [22]
2008-04-10 15:13:34.258: [ OCROSD][1]utread:3: problem reading buffer 244f000 buflen 512 retval 0 phy_offset 102400 retry 0
2008-04-10 15:13:34.258: [ OCROSD][1]utread:4: problem reading the buffer errno 25 errstring Inappropriate ioctl for device
2008-04-10 15:13:34.258: [ OCROSD][1]utread:3: problem reading buffer 244f000 buflen 4096 retval 0 phy_offset 102400 retry 0
2008-04-10 15:13:34.258: [ OCROSD][1]utread:4: problem reading the buffer errno 25 errstring Inappropriate ioctl for device
2008-04-10 15:13:34.258: [ OCRRAW][1]propriogid:1: INVALID FORMAT
2008-04-10 15:13:34.258: [ OCROSD][1]utread:3: problem reading buffer 244f000 buflen 4096 retval 0 phy_offset 102400 retry 0
2008-04-10 15:13:34.258: [ OCROSD][1]utread:4: problem reading the buffer errno 25 errstring Inappropriate ioctl for device
2008-04-10 15:13:34.258: [ OCRRAW][1]ibctx:1:ERROR: INVALID FORMAT
2008-04-10 15:13:34.258: [ OCRRAW][1]proprinitroblem reading the bootblock or superbloc 22

2008-04-10 15:13:34.258: [ OCROSD][1]utread:3: problem reading buffer 244f000 buflen 512 retval 0 phy_offset 102400 retry 0
2008-04-10 15:13:34.258: [ OCROSD][1]utread:4: problem reading the buffer errno 25 errstring Inappropriate ioctl for device
2008-04-10 15:13:34.258: [ OCROSD][1]utread:3: problem reading buffer 244f000 buflen 4096 retval 0 phy_offset 102400 retry 0
2008-04-10 15:13:34.258: [ OCROSD][1]utread:4: problem reading the buffer errno 25 errstring Inappropriate ioctl for device
2008-04-10 15:13:34.258: [ OCRRAW][1]propriogid:1: INVALID FORMAT
2008-04-10 15:13:34.299: [ OCRRAW][1]propriowv: Vote information on disk 0 [/opt/oracle/10.2.0.2/DB/cdata/localhost/local.ocr] is adjusted from [0/0] to [2/2]
2008-04-10 15:13:34.617: [ OCRRAW][1]propriniconfig:No 92 configuration
2008-04-10 15:13:34.618: [ OCRAPI][1]a_init:6a: Backend init successful