eddiewsw

從來RAID都唔係BACKUP SOLUTION
只係做個保險等你有機會去拎返D DATA

vialli

For those who don't want to have external standalone backup (and just rely on RAID XXX setup) ...  ...
pc1668 發表於 2017-6-8 11:18 AM

To be honest, I envy many "CHings" have space, money, devices, and most important, TIME to do offline backup.
RAID-1 is not a complete backup solution.
But it at least it can overcome harddisk failure compared with the situation not using RAID.

eddiewsw

To be honest, I envy many "CHings" have space, money, devices, and most important, TIME to do offli ...
vialli 發表於 2017-6-8 16:49

If you think the data are important, you will find some ways to protect them.

Offline backup is one of the easiest and somewhat cheapest way to protect your data
When the backup (copy, sync) is in progress, you can still surf the web, you can still use your computer, e.g. there is no conflict when you surf on web while backing up your data.

harryytm

To be honest, I envy many "CHings" have space, money, devices, and most important, TIME to do offline backup.
vialli 發表於 2017-6-8 16:49

The money use for data recovery is way much more than buying a new blank harddisk to make a mirror backup

RAID-1 is not a complete backup solution.
But it at least it can overcome harddisk failure compared with the situation not using RAID.
vialli 發表於 2017-6-8 16:49

Talking about harddisk failure, due to same wearing on all the disks in any type of RAID array setup, the probability of another disk(s) failure during RAID rebuild is very high, I've seen so may case like that on HKEPC forum and loss all the data in the process, so RAID cannot overcome harddisk failure from my point of view.

RAID 1/5/6 MUST use alongside with a mirror backup or any other form of data backup, in order to be effective to protect the data, just in case of another disk failure or any URE(Unrecoverable Read Error) during RAID rebuild.

harryytm

If you think the data are important, you will find some ways to protect them.

Offline backup is o ...
eddiewsw 發表於 2017-6-8 17:03

I just run the sync script , let FreeFileSync do its job and go to sleep.

It doesn't cost me too much time to sync all the mirror backup with FreeFileSync, because it just copy new or modified files to the backup disks, and automatically keep backup of old version of files for me.

harryytm

我的認知是
不理你行咩RAID/JBOD其實都不是backup
RAID/JBOD指的應該是儲存方式
你的其中多份backup可以是 ...
testcb00 發表於 2017-6-8 13:29

正確嚟講，當個RAID 1死剩一隻硬碟，第一時間應該要去Sync個RAID嘅Backup，到Sync完個Backup先至好去Rebuild個RAID。

任何嘅RAID無論係可以死幾多隻碟，都只可以視為一份嘅數據，一定夾埋Mirror/incremental Backup先至有保護作用。

-13-

raid 唔係backup.
raid 只可以救到死碟一樣.
其餘中毒爆炸倒瀉咖啡比人刪D\: 冇一樣救得到 ...
crackong 發表於 2017-6-7 12:03

    中毒爆炸倒瀉咖啡比人刪D\:  笑左

-13-

我覺得

既然係懶人

set個schedule full backup就OK

唔駛諗得太複雜

不過記得BACKUP去第二隻碟

alanh999

回覆 27# vialli


    RAID 1 is not a form of backup.

Let's consider if somebody deleted a file from the RAID volume - this file is gone from BOTH HDDs. Where's your backup then?

alanh999

To be honest, I envy many "CHings" have space, money, devices, and most important, TIME to do offli ...
vialli 發表於 8/6/2017 16:49

    I don't understand:

1. You have to buy 2 HDDs to form a RAID1 volume. There's not much cost difference than buying an HDD plus en external backup HDD.

2. Doing offline backup is just an activity of pressing a few buttons then the system will do all the work. Or if you are knowledgeable enough you can write a script for auto backup.
You will be spending much more time and money trying to rescue the files than doing offline backup if the latter is not in place.