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Forum Discussion
Definition: "A Backup Plan"
Disclaimer: I have had a ReadyNAS (of one sort or another) for 7 years now. The main reason I purchased mine? I wanted to ensure my data could survive a DRIVE FAILURE. **** I am very tired o...
RAID-5 and RAID-1 provide redundancy. They each protect against a single hard drive failing, allowing high up time and minimising the likelihood of needing to restore data from backup. Disk failure is very common and is important to protect against.
The general consensus in the IT community is that RAID and backup are two different things. A backup stored on a separate device is different to RAID. Yes, if you accidentally delete something or corrupt it, it could be replicated to a backup when that takes place, but it's not immediate. RAID was never designed to be treated as providing a backup of data, because it's not. You delete a file and it's gone from your array immediately.
Having the primary copy of your data on the ReadyNAS and a backup on a USB drive, or the primary copy on a PC and the backup on a ReadyNAS are both better options than having the primary copy on a PC and the backup on a USB drive.
The main objection to people treating RAID as if it were backup, is to do with things like accidental deletion, file corruption (e.g. due to a failed memory module), and pulling a disk from a RAID-1 array, thinking that this will give them a backup of their data. By considering RAID and backup as two different things, the average user can learn the differences between the two and avoid making terrible mistakes.
Of course off-site backups are crucial too.
The general consensus in the IT community is that RAID and backup are two different things. A backup stored on a separate device is different to RAID. Yes, if you accidentally delete something or corrupt it, it could be replicated to a backup when that takes place, but it's not immediate. RAID was never designed to be treated as providing a backup of data, because it's not. You delete a file and it's gone from your array immediately.
Having the primary copy of your data on the ReadyNAS and a backup on a USB drive, or the primary copy on a PC and the backup on a ReadyNAS are both better options than having the primary copy on a PC and the backup on a USB drive.
The main objection to people treating RAID as if it were backup, is to do with things like accidental deletion, file corruption (e.g. due to a failed memory module), and pulling a disk from a RAID-1 array, thinking that this will give them a backup of their data. By considering RAID and backup as two different things, the average user can learn the differences between the two and avoid making terrible mistakes.
Of course off-site backups are crucial too.
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