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visits member for 3 years, 10 months
seen Jun 14 '12 at 15:56

Aug
3
comment Mirroring file data between two servers
/IPG:n :: Inter-Packet Gap (ms), to free bandwidth on slow lines. /RH:hhmm-hhmm :: Run Hours - times when new copies may be started. /PF :: check run hours on a Per File (not per pass) basis. Can somewhat be replacements for the lack of QoS
Jul
19
answered Setup a Backup for 90k+ photos and desktop file structure
Apr
21
comment P2P VPN: cross between Hamachi and OpenVPN
UPnP isnt supported and enabled on all devices so i dont think this is their solution. Rather i also think its some customized STUN-based technique
Apr
17
awarded  Supporter
Apr
15
answered LSI MegaRaid warning: Patrol Read can't be started
Mar
29
answered How to make a byte for byte copy of a drive?
Jan
28
revised Recover bad data from RAID-0
added 2 links for reference
Jan
28
answered Recover bad data from RAID-0
Dec
13
awarded  Teacher
Dec
5
comment Improving RAID performance
raid 5 is really good for big files and for more loaded (more concurrent transfers) storage machine rather than for small random writes but reread my post as i edited a while ago i am using windows box instead of linux so there should be some differences in the filesystems as it is said ext3/4 alsmost doesn't get fragmented and i am not even sure if there's a tool to try to defragment even that 1 percent if there's such but as you said its better to use the raid5 volume for smth like backup storage of big (sequentially read/written) files
Dec
5
awarded  Editor
Dec
5
revised Improving RAID performance
added random transfer information and 1 controlelr configuration suggestion
Dec
5
comment Improving RAID performance
Journal does not help at all with write-back enabled hardware raids. To the filesystem data is as already written to the disk when it enters the controller's cache. Filesystem does not know when it is written to the actual physical drives. That's why i am not saying you must at all cost activate the write-back if u don't have BBU. UPS is an overall system protection against outer threats, but not against internal threats/faults like BBU protecting only the controllers cache. Which also doesn't mean BBU faults are not misheard etc.
Dec
5
comment Improving RAID performance
Well if the OS freezes totally the cache must be flushed after 4sec (be default) of inactivity to the disks after which the hard reset or even unplugging the power cord shouldn't be a problem. I accidentally did the unplugging power cord thing and consistency check after that did not show any problems although i am not very sure if the cache was already flushed or not. But i am yet to experience OS/system freeze although its quiet abused.
Dec
5
answered Improving RAID performance