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NAS Recovery Course - NAS Recovery Preparations Test
What helps you determine a sector size for disks partitioned with GPT?
EFI PART signature
main MBR
GPT database
EXT i-node
Check what information you can get if you know a NAS vendor and exact NAS model
supported RAID levels
possible filesystem types
hard drive sector size
disk order for RAID5 and RAID6
maximum number of disks
The information about a NAS coming from a client is often unreliable
yes
no
yes, but it's better than nothing
Choose the advantage of disk images compared to disk clones
convenience in storage and archival
reliability
speed
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
Check those S.M.A.R.T. attributes pointing to the bad condition of a disk
current pending sector count
start/stop count
offline uncorrectable sector count
G-sense error rate
reallocated sectors count
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 added disks
whether a client changed an array type
whether a client ever replaced disks
When recovering a NAS, it is always better to create disk image files rather than disk clones
true
false
Choose the advantage of disk clones compared to disk images
speed
reliability
convenience in storage and archival
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 8
divide the total size of partitions by 8
multiply the total size of partitions by 4
Next lesson - Partitions in NASes
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