我从一个离开公司的同事那里inheritance了FreeNAS的安装。 该安装用于保留我们在世界各地点缀的许多Web服务器的内部rsync备份。
FreeNAS中的存储空间不足，我发现我们仍然有从2013年退役的服务器的备份。我们不再需要这些旧的存档，所以我想删除它们以释放一些空间。
df -h的初始结果是：
... raid-1 283G 261G 22G 92% /mnt/raid-1 raid-1/clone-auto-20140925.0800-2m 283G 261G 22G 92% /mnt/raid-1/clone-auto-20140925.0800-2m ...
所以，在我的天真中，我只是删除了旧的rsync快照，即rm -rf /mnt/raid-1/backups/old.server.1 /mnt/raid-1/backups/old.server.2 。 之后， df -h现在看起来像：
... raid-1 266G 244G 22G 92% /mnt/raid-1 raid-1/clone-auto-20140925.0800-2m 283G 261G 22G 92% /mnt/raid-1/clone-auto-20140925.0800-2m ...
O_O
我把这个问题缩小到了我对ZFS缺乏了解的地步。 显然， df并不是我所期望的传统意义上的磁盘使用情况报告，也不是一个天真的删除来解决我的问题。
如果有人能够，我将非常感激：
编辑1
我一直在阅读，现在我明白，由于ZFS的CoW，空间不会被释放。
zfs list输出：
NAME USED AVAIL REFER MOUNTPOINT raid-1 1.76T 21.5G 245G /mnt/raid-1 raid-1/clone-auto-20140925.0800-2m 34.8G 21.5G 261G /mnt/raid-1/clone-auto-20140925.0800-2m
编辑2
输出`zfs list -t快照
NAME USED AVAIL REFER MOUNTPOINT [email protected] 91.0G - 261G - [email protected] 9.13G - 301G - [email protected] 4.68G - 301G - [email protected] 4.70G - 302G - [email protected] 4.63G - 302G - [email protected] 15.5G - 297G - [email protected] 15.6G - 297G - [email protected] 15.7G - 297G - [email protected] 16.0G - 297G - [email protected] 15.9G - 297G - [email protected] 16.2G - 298G - [email protected] 15.2G - 297G - [email protected] 13.8G - 297G - [email protected] 14.1G - 298G - [email protected] 19.1G - 298G - [email protected] 19.3G - 299G - [email protected] 16.6G - 299G - [email protected] 16.7G - 300G - [email protected] 15.7G - 299G - [email protected] 16.3G - 300G - [email protected] 16.6G - 300G - [email protected] 19.5G - 300G - [email protected] 19.8G - 299G - [email protected] 17.4G - 299G - [email protected] 17.6G - 300G - [email protected] 16.4G - 299G - [email protected] 16.9G - 300G - [email protected] 17.5G - 297G - [email protected] 20.0G - 297G - [email protected] 20.2G - 297G - [email protected] 5.43G - 297G - [email protected] 5.46G - 302G - [email protected] 16.7G - 307G - [email protected] 16.8G - 308G - [email protected] 17.2G - 309G - [email protected] 20.5G - 309G - [email protected] 17.4G - 309G - [email protected] 17.7G - 310G - [email protected] 17.8G - 311G - [email protected] 575M - 310G - [email protected] 575M - 310G - [email protected] 20.9G - 309G - [email protected] 21.0G - 309G - [email protected] 20.6G - 306G - [email protected] 17.8G - 306G - [email protected] 18.1G - 308G - [email protected] 561M - 307G - [email protected] 561M - 307G - [email protected] 20.7G - 308G - [email protected] 21.3G - 308G - [email protected] 21.6G - 308G - [email protected] 18.9G - 309G - [email protected] 19.1G - 310G - [email protected] 18.0G - 309G - [email protected] 18.2G - 309G - [email protected] 18.6G - 310G - [email protected] 19.1G - 310G - [email protected] 22.1G - 238G - [email protected] 19.4G - 238G - [email protected] 12.2G - 239G - [email protected] 314M - 245G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 584M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 584M - 261G - raid-1/[email protected] 584M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 584M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 585M - 261G - raid-1/[email protected] 584M - 261G -
看起来您正在使用ZFS数据集的定期快照。 任何删除的数据都将保存在快照中。 要删除快照，请运行zfs destroy raid-1@[snapshotname]有关zfs destroy raid-1@[snapshotname]的完整说明，请查看文档
如果你想一次删除一堆快照，看看这个答案 。