当我尝试启动服务器加密时，我一直收到此错误：
iMac:~ User$ mongod --enableEncryption --encryptionKeyFile /data/encryrest/mongodb-keyfile
2016-09-28T08:43:06.120-0700 I CONTROL [initandlisten] MongoDB starting : pid=50483 port=27017 dbpath=/data/db 64-bit host=iMac.local
2016-09-28T08:43:06.121-0700 I CONTROL [initandlisten] db version v3.2.9
2016-09-28T08:43:06.121-0700 I CONTROL [initandlisten] git version: 22ec9e93b40c85fc7cae7d56e7d6a02fd811088c
2016-09-28T08:43:06.121-0700 I CONTROL [initandlisten] OpenSSL version: OpenSSL 0.9.8zh 14 Jan 2016
2016-09-28T08:43:06.121-0700 I CONTROL [initandlisten] allocator: system
2016-09-28T08:43:06.121-0700 I CONTROL [initandlisten] modules: enterprise
2016-09-28T08:43:06.121-0700 I CONTROL [initandlisten] build environment:
2016-09-28T08:43:06.121-0700 I CONTROL [initandlisten] distarch: x86_64
2016-09-28T08:43:06.121-0700 I CONTROL [initandlisten] target_arch: x86_64
2016-09-28T08:43:06.121-0700 I CONTROL [initandlisten] options: { security: { enableEncryption: true, encryptionKeyFile: "/data/encryrest/mongodb-keyfile" } }
2016-09-28T08:43:06.139-0700 I - [initandlisten] Detected data files in /data/db created by the 'wiredTiger' storage engine, so setting the active storage engine to 'wiredTiger'.
2016-09-28T08:43:06.139-0700 I STORAGE [initandlisten] wiredtiger_open config: create,cache_size=6G,session_max=20000,eviction=(threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),checkpoint=(wait=60,log_size=2GB),statistics_log=(wait=0),extensions=[local=(entry=mongo_addWiredTigerEncryptors)],encryption=(name=AES256-CBC,keyid=".system"),
2016-09-28T08:43:06.140-0700 W STORAGE [initandlisten] It looks like the data files were previously encrypted using an external key with id .DS_Store. Attempting to use the provided key file.
2016-09-28T08:43:09.336-0700 E STORAGE [initandlisten] WiredTiger (-31802) [1475077389:336536][50483:0x7fff7d80e000], file:WiredTiger.wt, connection: unable to read root page from file:WiredTiger.wt: WT_ERROR: non-specific WiredTiger error
2016-09-28T08:43:09.336-0700 E STORAGE [initandlisten] WiredTiger (0) [1475077389:336604][50483:0x7fff7d80e000], file:WiredTiger.wt, connection: WiredTiger has failed to open its metadata
2016-09-28T08:43:09.336-0700 E STORAGE [initandlisten] WiredTiger (0) [1475077389:336632][50483:0x7fff7d80e000], file:WiredTiger.wt, connection: This may be due to the database files being encrypted, being from an older version or due to corruption on disk
2016-09-28T08:43:09.336-0700 E STORAGE [initandlisten] WiredTiger (0) [1475077389:336664][50483:0x7fff7d80e000], file:WiredTiger.wt, connection: You should confirm that you have opened the database with the correct options including all encryption and compression options
2016-09-28T08:43:10.136-0700 I - [initandlisten] Assertion: 28595:-31802: WT_ERROR: non-specific WiredTiger error
2016-09-28T08:43:10.136-0700 I STORAGE [initandlisten] exception in initAndListen: 28595 -31802: WT_ERROR: non-specific WiredTiger error, terminating
2016-09-28T08:43:10.136-0700 I CONTROL [initandlisten] dbexit: rc: 100
iMac:~ User$
我在Mac OS X上，假设WiredTiger出现问题。谁能帮我？谢谢！