Sono in procinto di valutare diversi antivirus su Mac OS X. (Mountain Lion, Mavericks, Yosemite ...). Dopo aver eseguito una scansione completa per testare Sophos su un Mac Mountain Lion, ho assistito a un rallentamento totale di questa scansione senza alcun errore, suggerimento o spiegazione.
Quindi ho cercato il file di registro di sistema standard per vedere da cosa potrebbe provenire questo problema nascosto.
Ho molte sequenze ripetute di messaggi di errore provenienti da decmpfs che sono correlati al tempo:
Aug 16 01:22:01 ••my Mac•• com.apple.backupd[54217]: Backing up to: /Volumes/••my backup volume••/Backups.backupdb Aug 16 01:22:01 ••my Mac•• kernel[0]: /SourceCache/AppleFSCompression_kexts/AppleFSCompression-49/Compressors/Dataless/compressorType5Kext.c:532: Error: post_request error for /Volumes/••my backup volume••/Backups.backupdb/••my Mac••/2015-07-23-080243/••my Mac root volume••/.DocumentRevisions-V100/PerUID/501/2a/com.apple.documentVersions/B15D3CEE-6DAA-4EB2-AD77-B8EBD67CBD41.pages: 35 Aug 16 01:22:01 ••my Mac•• kernel[0]: decmpfs.c:1339:decmpfs_read_compressed: decmpfs_fetch_uncompressed_data err -35 Aug 16 01:22:06 ••my Mac•• com.apple.backupd[54217]: Using file event preflight for ••my Mac root volume•• Aug 16 01:22:06 ••my Mac•• com.apple.backupd[54217]: Will copy (445 KB) from ••my Mac root volume•• Aug 16 01:22:06 ••my Mac•• com.apple.backupd[54217]: Found 41 files (445 KB) needing backup Aug 16 01:22:06 ••my Mac•• com.apple.backupd[54217]: 1.83 GB required (including padding), 5.53 GB available Aug 16 01:22:16 ••my Mac•• kernel[0]: /SourceCache/AppleFSCompression_kexts/AppleFSCompression-49/Compressors/Dataless/compressorType5Kext.c:532: Error: post_request error for /Volumes/••my backup volume••/Backups.backupdb/••my Mac••/2015-07-23-080243/••my Mac root volume••/.DocumentRevisions-V100/PerUID/501/2a/com.apple.documentVersions/B15D3CEE-6DAA-4EB2-AD77-B8EBD67CBD41.pages: 35 Aug 16 01:22:16 ••my Mac•• kernel[0]: decmpfs.c:1339:decmpfs_read_compressed: decmpfs_fetch_uncompressed_data err -35 Aug 16 01:22:32 ••my Mac•• kernel[0]: /SourceCache/AppleFSCompression_kexts/AppleFSCompression-49/Compressors/Dataless/compressorType5Kext.c:532: Error: post_request error for /Volumes/••my backup volume••/Backups.backupdb/••my Mac••/2015-07-23-080243/••my Mac root volume••/.DocumentRevisions-V100/PerUID/501/2b/com.apple.documentVersions/025F1963-3BA9-4B0B-ADFD-4E51082CC82B.pages: 35 Aug 16 01:22:32 ••my Mac•• kernel[0]: decmpfs.c:1339:decmpfs_read_compressed: decmpfs_fetch_uncompressed_data err -35 Aug 16 01:22:37 ••my Mac•• com.apple.backupd[54217]: Copied 1379 files (462 KB) from volume ••my Mac root volume••. Aug 16 01:22:39 ••my Mac•• com.apple.backupd[54217]: Using file event preflight for ••my Mac root volume•• Aug 16 01:22:39 ••my Mac•• com.apple.backupd[54217]: Will copy (Zero KB) from ••my Mac root volume•• Aug 16 01:22:39 ••my Mac•• com.apple.backupd[54217]: Found 6 files (Zero KB) needing backup Aug 16 01:22:39 ••my Mac•• com.apple.backupd[54217]: 1.83 GB required (including padding), 5.53 GB available Aug 16 01:22:43 ••my Mac•• com.apple.backupd[54217]: Copied 155 files (153 bytes) from volume ••my Mac root volume••. Aug 16 01:22:44 ••my Mac•• com.apple.backupd[54217]: Created new backup: 2015-08-16-012243 Aug 16 01:22:44 ••my Mac•• com.apple.backupd[54217]: Starting post-backup thinning Aug 16 01:22:44 ••my Mac•• com.apple.backupd[54217]: No post-back up thinning needed: no expired backups exist Aug 16 01:22:44 ••my Mac•• com.apple.backupd[54217]: Backup completed successfully.
Ho effettuato una ricerca all'interno della Knowledge Base di Apple e non ho trovato nulla. Ho trovato molte discussioni su questo tipo di errori nei gruppi di discussione di Apple. Ma niente al livello sopra la discussione.
Un'analisi temporale del mio /var/log/system.log.*.bz2 mostra che non ho mai avuto un tale errore del kernel entro 7 giorni prima e che il primo si è verificato nel momento esatto in cui ho iniziato la mia prima scansione con Sophos.
Che cosa intendono?