ZyXEL NSA-2400 用户指南

Chapter 9 Troubleshooting

NSA-2400 User’s Guide

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The NSA-2400 time and date must be the same as the time and date on the 
external domain controller if the NSA is using one to import users and group.

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I cannot make a backup.

• Check the logs to find the reason why the backup failed.

• Check that the external USB disk or NSA volume was formatted as BACKUP. Backup 

disks must be formatted by the NSA as a disk of type BACKUP. You cannot back up to 
other file systems such as NTFS, FAT, or FAT32.

• If you’re backing up to another NSA-2400, check that it has the same firmware version as 

the NSA-2400 you’re backing up from. You cannot back up to other NAS devices, 
computers or tape drives.

• Check that enough space is available on the external disk. If there isn’t you may need to 

purge older backups or delete other files on the backup USB disk or NSA-2400 (see 

• Check that there is not another backup being done. Scheduler queues backups when a 

different backup is already going on at the time a backup is scheduled.

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I cannot take a snapshot

• Check the logs to find the reason why the snapshot failed.

• A snapshot must be done on a complete volume. Check that the volume is not down or 

degraded. If it is, then see 

• Up to 10 snapshots in total are allowed on the NSA-2400. If you have reached this limit, 

then you will have to purge older snapshots before you can take new ones.

• Check that enough space is available on the volume. If there isn’t you may need to purge 

older snapshots (see 

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The snapshot or backup does not run at the time configured.

• Check that the correct time is configured on the NSA-2400.

• Check that the NSA-2400 is able to access the time server from which it gets the time; see 

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