What Is RAID 5 advantage over simple backup?
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Another OS management question. My impression of RAID 5 is to prevent hardware AKA HDD failure. The RAID is dynamically updated , hence any unwanted (file ) changes are faithfully replicated. With that assumption - Would manual backup , not automatic as RAID does, be more productive>? Then there are tools which can be optioned to do just backup - sort of semi-automatically.
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Another OS management question. My impression of RAID 5 is to prevent hardware AKA HDD failure. The RAID is dynamically updated , hence any unwanted (file ) changes are faithfully replicated. With that assumption - Would manual backup , not automatic as RAID does, be more productive>? Then there are tools which can be optioned to do just backup - sort of semi-automatically.
Member 14968771 wrote:
With that assumption - Would manual backup , not automatic as RAID does, be more productive>?
It takes time to restore a backup, and all of IT at the coffeemachine, waiting for you. That's expensive.
Member 14968771 wrote:
Then there are tools which can be optioned to do just backup - sort of semi-automatically.
RAID isn't a form of backup. It's redunancy. And drive may fail, and no user notices. No need to talk backups. Mine is based on Linux and cheap pendrives. I never backup.
Bastard Programmer from Hell :suss: "If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.
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Another OS management question. My impression of RAID 5 is to prevent hardware AKA HDD failure. The RAID is dynamically updated , hence any unwanted (file ) changes are faithfully replicated. With that assumption - Would manual backup , not automatic as RAID does, be more productive>? Then there are tools which can be optioned to do just backup - sort of semi-automatically.
RAID does not replace the need for a backup. RAID5 is protects against a SINGLE drive failure. If a second drive fails while a previous drive is still failed or is in the process of rebuilding after replacement, you will lose data.
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Dave Kreskowiak -
Another OS management question. My impression of RAID 5 is to prevent hardware AKA HDD failure. The RAID is dynamically updated , hence any unwanted (file ) changes are faithfully replicated. With that assumption - Would manual backup , not automatic as RAID does, be more productive>? Then there are tools which can be optioned to do just backup - sort of semi-automatically.
Think of RAID as providing long term reliability. A RAID cluster can normally survive at least one drive going bad. A backup, on the other hand, is what you need in the event of anything from "finger trouble" erasing data, or a bug writing bad data, to a critical systems failure, such as a flood or file, from which you need to rebuild your operating environment.
Keep Calm and Carry On
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Another OS management question. My impression of RAID 5 is to prevent hardware AKA HDD failure. The RAID is dynamically updated , hence any unwanted (file ) changes are faithfully replicated. With that assumption - Would manual backup , not automatic as RAID does, be more productive>? Then there are tools which can be optioned to do just backup - sort of semi-automatically.
If the only way to loose your files is a hard disk failure, then you may consider RAID5 to be a "backup" solution (the "backup" being stored in the redundancy bits of the non-crashed disks. For all other issues - fire, flooding, machine/disk stolen/lost, inadvertent file deletion or content modification, ransom virus, discovering that a virus has infected a lot of your files, ... - you need a decent backup. For a great number of the risks, you also need offline, offside backup. You need frequent backup, at least daily, which implies that you need incremental backup. And everyone should know The Tao of Backup[^] :-) - Old, but as valid as ever.