is it possible to recover data from Raid 0 (Spanning) JBOD

Edited by hamluis, 13 June 2020 - 11:06 AM.
Moved from External Hardware to Internal Hardware - Hamluis.

Info.

Louis

Edited by hamluis, 23 April 2024 - 08:03 AM.

thanks for your reply,

Edited by Mohammednt0, 13 June 2020 - 12:01 PM.

IMO...neither.  RAID setups became prominent before large hard drives, SSDs, and backup software which can be relied upon.  Not sure why some still consider using such.

Timely conduct of backups eliminates the need for worrying about data recovery...of course, the weak link is the user.

I've engaged in data recovery situations (in earlier years) and I had a couple of RAID setups (in earlier years)...for me, a reliable 3d-party backup/imaging solution has proven to be more efficient and more worry-free.

Others here may have a different opinion.

Louis

Edited by hamluis, 13 June 2020 - 07:20 PM.

To address your questions:

Neither one.

With both RAID 0 and JBOD, if one disk fails or you switch modes, your data is gone. Neither option offers any redundancy.

I have seen some newer products claim that JBOD can tolerate a single disk failure, but it is FAR from guaranteed. I would like to see the model of your RAID enclosure.

People have often questioned why they even call RAID 0 a "RAID" at all, since it is not redundant. Slang terms for RAID 0 include "fake RAID."

The legitimate uses for the two:

RAID 0 - modest performance boost

JBOD - you can combine dissimilar disks into one group, and treat them as a single block of storage. This avoids a problem of having to decide on which disk you want to store something.

With both options, you actually increase the chances of having a disk failure in the first place.

A single disk failure breaks the array, so the array would need to be rebuilt when you get a replacement disk.

IMO...neither.  RAID setups became prominent before large hard drives, SSDs, and backup software which can be relied upon.  Not sure why some still consider using such.

 

Timely conduct of backups eliminates the need for worrying about data recovery...of course, the weak link is the user.

 

I've engaged in data recovery situations (in earlier years) and I had a couple of RAID setups (in earlier years)...for me, a reliable 3d-party backup/imaging solution has proven to be more efficient and more worry-free.

 

Others here may have a different opinion.

 

Louis

thanks for your reply, i agree that 3d-party backup/imaging is much better but its not an option for me

To address your questions:

Neither one.

With both RAID 0 and JBOD, if one disk fails or you switch modes, your data is gone. Neither option offers any redundancy.

I have seen some newer products claim that JBOD can tolerate a single disk failure, but it is FAR from guaranteed. I would like to see the model of your RAID enclosure.

People have often questioned why they even call RAID 0 a "RAID" at all, since it is not redundant. Slang terms for RAID 0 include "fake RAID."

 

The legitimate uses for the two:

RAID 0 - modest performance boost

JBOD - you can combine dissimilar disks into one group, and treat them as a single block of storage. This avoids a problem of having to decide on which disk you want to store something.

 

With both options, you actually increase the chances of having a disk failure in the first place.

 

A single disk failure breaks the array, so the array would need to be rebuilt when you get a replacement disk.

i have 2 Raid Storages: 

Mediasonic HFR2-SU3S2 ProRaid 4-Bay Enclosure

Mobius 5-Bay Enclosure SKU3R5-EB3-M

the reason for why i opened this thread is that i'm trying to cover all scenarios,

◼ i have 2 Hardware RAID Storage, one is on site and the other is offsite, the first one is for daily use, and the second one i use it as backup

◼ the first RAID storage is 5-bay (More bays = more space) , in this raid storage 4-HDDs will be enough so i loaded the fifth HDD and set it on RAID 5 to provide protection (fault tolerance)

◼ the second RAID storage is 4-bay, (less bays = less storage) i don't have enough bays, so since i don't have enough bays/space to use RAID 5 i'm forced to use RAID 0 or JBOD, i'm planing to use it as backup and keep it in another site

◼ in case of unit failure and the raid system is not broken i confirmed that when one of the units fails i can buy a new unit (same model) and then insert the drive in the same order and it will work again!

◼ finally in case something wrong happened to the JBOD Storage , i want to make sure that things remain simple and easy for me to recover data, from what i read RAID is much harder in data recovery. 

So i do have a RAID 5 storage and i do have an offsite backup i just wanted to cover all scenarios and learn more

any advise is appreciated

thanks

Edited by Mohammednt0, 14 June 2020 - 01:14 AM.

 

thanks for your reply, i agree that 3d-party backup/imaging is much better but its not an option for me

 

Considering that there are free versions of 3d-party backup/imaging software...I fail to understand how such cannot be an option for anyone with a computer system that actually works.

Example.

Example2.

Louis

Edited by hamluis, 14 June 2020 - 08:57 AM.

 

Good Day,

 

Q.1 if i use Raid 0 (Spanning) JBOD mode, and one of the 4 drives fails the others will still be readable/accessible ?

Q.2 in Raid 0 (Spanning) JBOD mode, when one of the drives fails can i replace it without broken the JBOD mode ?

Q.3 Can i simply remove the faulty drive and do data recovery on it ?

 

regards,

Mohammednt0

 

If you are interested in data recovery from RAID of disk 0, then use special software. The program is called RAID Recovery, it restores not only data, but also the structure. Actual for your problem.

Edited by Zavorskiy, 29 June 2020 - 01:46 PM.

1) In RAID 0 (Striping) or JBOD (Just a Bunch Of Disks) configuration, data is striped across all the drives, and if one drive fails, all data stored on the array becomes inaccessible and unreadable. This is because the data is split across all the drives, and without one of the drives, the entire array is considered failed.
2) In RAID 0 or JBOD mode, if one drive fails, you cannot simply replace it with a new drive and continue using the array. The entire array has to be re-created, and data needs to be restored from a backup (if available). Replacing a failed drive in this configuration will not restore the array or allow you to access the remaining data.
3) Yes, you can remove the faulty drive and attempt data recovery on it. However, since the data is striped across all the drives in RAID 0 or JBOD, recovering data from a single drive may not be possible or may result in incomplete or corrupted data. Data recovery in these scenarios is often challenging and may require professional data recovery services.
In summary, RAID 0 and JBOD offer no redundancy or fault tolerance. If one drive fails, the entire array is considered failed, and data cannot be accessed or recovered without a backup. It is generally recommended to use RAID configurations that provide redundancy, such as RAID 1 (Mirroring), RAID 5, or RAID 6, if data protection is a priority.