Tyler J. Wagner wrote: > Raid5: Lose power during write operation = silent data corruption, which > you'll find out about next time you try to rebuild. depends on your disk array. good hardware raid has a battery-backed write cache which will prevent such issues. As long as the power comes back before your battery dies.
Les Mikesell wrote: > The real problem is that there are parts of the disk that haven't been > accessed for a while and the errors already exist on multiple drives > before you notice them. For software raid, I thought a cron job was > supposed to be testing them periodically, but the notification may not > reach you - and hardware raid may not to the tests. Depends on your software RAID. When I last checked, solaris did not automatically check your zfs raids. FreeBSD 8.0 doesn't. various folks said: > RAID10 performs better than RAID6. Or vice versa. depends on your use case. broadly speaking, if you are doing large reads and writes, or doing mostly reads, raid5/6 will be faster. for random i/o raid10 will be faster. -- Dan Pritts, Sr. Systems Engineer Internet2 office: +1-734-352-4953 | mobile: +1-734-834-7224 ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2dcopy1 _______________________________________________ BackupPC-users mailing list [email protected] List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
