I have read Cyberjock's "ZFS Storage Design and other FreeNAS information" PowerPoint slide and stumbled over the following entry on page 35:
Now i am curious.
Let's assume i do have a power loss and no UPS, how likely is then a corrupted zpool?
Is this guaranteed, will a power loss definitely result in a corrupted zpool or is there only a small chance of corruption?
And if the latter is the case, what is required for that?
Does this only happen in an event, when data is written on the zpool or can this also happen when the NAS is just online?
I will use my FreeNAS only for home user cases, thus i won't have intensive write tasks all the time, and a loss of power is very rare at my location, do i still need an UPS?
Especially if i can read most of the data back from backups.
Code:
The resultant improper shutdowns of your system can result in a corrupted zpool that will no longer mount.
Now i am curious.
Let's assume i do have a power loss and no UPS, how likely is then a corrupted zpool?
Is this guaranteed, will a power loss definitely result in a corrupted zpool or is there only a small chance of corruption?
And if the latter is the case, what is required for that?
Does this only happen in an event, when data is written on the zpool or can this also happen when the NAS is just online?
I will use my FreeNAS only for home user cases, thus i won't have intensive write tasks all the time, and a loss of power is very rare at my location, do i still need an UPS?
Especially if i can read most of the data back from backups.