ReclaiMe Data Recovery Training

NAS Recovery Course - NAS Recovery Preparations Test

Choose the advantage of disk images compared to disk clones

reliability
convenience in storage and archival
speed

Check what information you can get if you know a NAS vendor and exact NAS model

Choose the advantage of disk clones compared to disk images

convenience in storage and archival
reliability
speed

Check what you should ask a client about a NAS configuration

whether a client used disks of the same model in a NAS
whether a client ever replaced disks
whether a client ever added disks
whether a client changed an array type

You need to check sector sizes for each disk form a NAS when

array type has been changed
disks of different models are used in a NAS
a client does not remember what sector sizes he/she set up when installing disks

Check based on what you can estimate the state of physical disks in a NAS

the words of a client
the S.M.A.R.T. attributes
sounds coming from the disks

The information about a NAS coming from a client is often unreliable

yes, but it's better than nothing
no
yes

Why they do not recommend storing several disk image files on the same disk when recovering data?

the disk may degrade due to the frequent read requests
recovery will be too slow

What do you need to try if the sum of sizes of partitions does not correspond to the size of a physical disk and you suspect the sector size is uncorrect?

multiply the total size of partitions by 4
divide the total size of partitions by 8
multiply the total size of partitions by 8

Check those S.M.A.R.T. attributes pointing to the bad condition of a disk

Next lesson - Partitions in NASes

We have a mailing list in which we talk about interesting cases we encounter and share some tips and tricks.