Buffalo TeraStation 3010 User Manual page 218

Chapter 8 Drive Replacement
If you must change a drive that is not malfunctioning, either first dismount it in Settings, referring to the
"Dismounting Drives" section in chapter 4, or shut down the TeraStation before replacing the drive. If you need to
replace more than one drive all at once, replace the drives one at a time to preserve your data. When replacing the
non-malfunctioning drive, the RAID array will function as below:
Operating in RAID 0 Mode
All data on the RAID array will be deleted after replacing the drive. You will be unable to use the TeraStation until
you delete and rebuild the RAID array with the new drive.
Operating in JBOD
All data on that drive will be deleted after replacing the drive. You will be unable to use the TeraStation until you
format the new drive.
Operating in a Redundant RAID Mode
If you are using a redundant RAID mode such as RAID 1, 5, or 6, the RAID array will be in degraded mode after
replacing the drive. You will be unable to use the TeraStation until you rebuild the RAID array with the new drive.
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