Maybe that’s why the SSD write test on TS-112 and TS119PII are slower than traditional hard drive. Need to enable trim in QNAP. For Linux kernel 2.6.33, trim is disabled by default.
Indeed if a SSD doesn’t trim, then every write to a previously written block must first be read, erased, modified, and re-written to the same location thus crippling write performance.
Since I have run quite some benchmark tests, and massively copied large files such .vmdk and .iso files and deleted them all afterward, the write performance got lower and lower.
My TS-459 runs a Linux QNAPNAS02 126.96.36.199 which does support natively TRIM function but I was sad to learn that while it’s available, it is not used at all because it is inadequate for today’s real TRIM hardware. This is not a QNAP problem but an issue with the Linux kernel developers. In the interim Mark Lord, who’s by the way one…
View original post 819 more words