Error CBM_READ_ONLY_ERROR Logged when Trying to Archive files to CloudPools

Errors similar to the following are encountered in the log files /var/log/messages or /var/log/isi_cpool_d.log on any of the cluster nodes while archiving files to CloudPools.

2018-01-17T08:20:24+01:00 <0.3> Isilon-5 /boot/kernel.amd64/kernel: [bam_cpool.c:327](pid 4695="isi_cpool_d")(tid=101280) bam_cpool_update_attr: 
failure to update cpool attr ifsus_cpool_map_size for 1:8b51:0e9b::HEAD, error 30

2018-01-17T08:20:24+01:00 <0.3> isilon-5 /boot/kernel.amd64/kernel: [bam_cpool.c:363](pid 4695="isi_cpool_d")(tid=101280) bam_cpool_stub_map_write: 
failure to write cpool map size for 1:8b51:0e9b::HEAD, error 30

2018-01-17T08:20:24+01:00 <0.3> Isilon-5 /boot/kernel.amd64/kernel: [bam_cpool.c:1141](pid 4695="isi_cpool_d")(tid=101280) bam_cpool_stub_file_common: 
Failed write of stub map to EA for 1:8b51:0e9b::HEAD, error 30

2018-01-17T08:21:29+01:00 <3.3> isilon-5 isi_cpool_d[4695]: [0x80ee8dc10]: /b/mnt/src/isilon/lib/isi_cpool_d/task_processing_thread_pool.cpp:run_consumer_function:196: 
run_consumer_function complete for task ([archive/1:8ab8:0181::HEAD]/FPP_Name): Invalid attempt to stub read only FS; lin 1:8ab8:0181: [error code: CBM_READ_ONLY_ERROR]     
from write_map_core (/b/mnt/src/isilon/lib/isi_cpool_cbm/isi_cbm_mapper.cpp:1610)     from write_map (/b/mnt/src/isilon/lib/isi_cpool_cbm/isi_cbm_mapper.cpp:1653)     
from isi_cph_create_stub (/b/mnt/src/isilon/lib/isi_cpool_cbm/isi_cbm_archive.cpp:1073)     from isi_cbm_archive_common (/b/mnt/src/isilon/lib/isi_cpool_cbm/isi_cbm_archive.cpp:934)     
from isi_cbm_archive (/b/mnt/src/isilon/lib/isi_cpool_cbm/isi_cbm_archive.cpp:312)

2018-01-17T08:21:29+01:00 <0.3> Isilon-5 /boot/kernel.amd64/kernel: [bam_cpool.c:327](pid 4695="isi_cpool_d")(tid=101278) bam_cpool_update_attr: failure to update cpool 
attr ifsus_cpool_map_size for 1:8ab8:0181::HEAD, error 30

2018-01-17T08:21:29+01:00 <0.3> Isilon-5 /boot/kernel.amd64/kernel: [bam_cpool.c:363](pid 4695="isi_cpool_d")(tid=101278) bam_cpool_stub_map_write: failure to write cpool map size for 1:8ab8:0181::HEAD, error 30

2018-01-17T13:13:17-04:00 <3.3> isilon-1 isi_cpool_d[3034]: [0x80fe26310]: /b/mnt/src/isilon/lib/isi_cpool_d/task_processing_thread_pool.cpp:run_consumer_function:351: 
run_consumer_function complete for task ([archive/1:abcd:1234::HEAD]/Archive to S3): Lin 1:abcd:1234 is WORM committed: [error code: CBM_PERM_ERROR]     
from isi_cbm_archive (/b/mnt/src/isilon/lib/isi_cpool_cbm/isi_cbm_archive.cpp:295)

These messages indicate that the wanted task cannot occur due to a read-only condition of either the file, directory path, node, or cluster. 

Investigate the reason for the cluster or node being in a read-only state.

The most common reason for this to occur is when the directory being targeted for archival is either a SyncIQ target Path or a WORM directory. These paths cannot be smart-linked (as they are read-only). If smart-linked files are wanted in a SyncIQ target directory, the files on the source cluster must be archived first. The smart-linked files can then be synchronized over to the Disaster Recovery (DR) or target cluster with SyncIQ.