D-Link Forums
The Graveyard - Products No Longer Supported => D-Link Storage => DNS-323 => Topic started by: spotUP on July 14, 2009, 09:56:26 AM
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I had a raid1 crash :( so i had to recover my files. i managed to get them onto another disk.
After that i installed firmware 1.08 (beta) and reformated the drives, in standard two disk mode.
And my windows machine couldnt mount them anymore.
I don't remember the error message i got when i ran the diagnostics tool for the ext2 filesystem via the windows box.
But blocksize or something was too big.
So i went back to firmware 1.06 and reformatted the drives, and now all is fine.
I will never trust raid1 on this device again.
I will have it make backups from drive 1 to drive 2 each night.
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I will never trust raid1 on this device again.
I will have it make backups from drive 1 to drive 2 each night.
RAID1 is not a backup and a backup can never achieve the same result as a RAID1 array - it is when the two are confused that people become disillusioned about the technology. RAID1 on the DNS-323 works, I've been using it for almost two and a half years now, with no regrets.
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I had a raid1 crash :( so i had to recover my files.
What exactly happened to your RAID1? Did one of the hard drives stop working?
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Many many people select RAID1 incorrectly. At the risk of getting flamed; most -I dare say- probably do NOT want RAID1. They want something more like "standard" (which means you have two separate hard drives) with drive2 set to automatically backup from drive1. (Please skip the rest of this message if you fully understand RAID.) Let me explain little bit further: raid1 works perfectly well when it is used as intended; yet most people new to RAID make the mistake of thinking that RAID1 protects them more than it really does;
- RAID1 will provide continuity ONLY if one of your two hard drives fail -- meaning if one drive physically fails, the other drive will seamlessly take over. typically this is in a computing environment where it is important that the network share is always available.
- if data is corrupted it will be corrupted on both drives
--+this is why you will hear people repeatedly say 'raid is not backup.' which is a concept that understandably confuses quite a few people. Don't feel bad, it took me quite awhile to understand RAID fully.
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When people newish to RAID select RAID1, I think what they want the DNS323 to do is to backup the files on hard drive1 to hard drive2. If this is what you want, you would be better served by setting the drives in the DNS323 up as 'standard' and tell hard drive #2 to connect to hard drive#1 every night and run a backup.
- if either hard drive fails, you will lose a maximum of one day of work. remember that today's hard drives are configured with SMART (which predicts and warns you of a hard drive failure before it totally fails) --and while not perfect-- SMART works extremely well. if you setup your DNS323 configuration to email you on event of SMART event, you will have plenty of warning.
- if you accidentally delete a file you can simply go to volume 2 and copy it back (on RAID1, once you delete a file, it's gone from BOTH drives). Caveat: a deleted file has to have been old enough to have been backed up in order to be restored.
- DNS323 config can be easily setup so that it will automatically connect via ftp and copy files; so once this is done and tested, it'll do this on schedule without user intervention
- you can far more dynamically upgrade a hard drive with 'standard.' Say, for example, you have two 500gb drives. by changing the second (vol2) drive to a 1500gb drive you can now not only back up your vol1 drive, but you can also run a backup program on your family PCs so they back up user files to vol2 as well. With RAID1 you'd need to add drives in pairs.