B/c on writes, in some situations, you are limited by the interface to cache transfer rate, rather than the physical media transfer rate for reads. Depending on the number of drives, RAID implementation, and size of on-disk cache, you can maintain a higher write speed for an extended period of time.Just like my other NSA units the write speed is always faster than the read speed. I never can understand the rationale for that. Regular drives always have faster reads than writes.
Hey thereLong time since I've been around! Great to see conversations still going!
I too am moving to 10GB due to large file transfers. I have a detached garage with a single run of Cat6 where I have a Wifi access point, some POE cameras, and a TrueNAS Core box. I'm considering if I should replace the single run of Cat6 with fiber optic (multimode OC3?), both so I can send larger backups quicker but also to help minimize risk of a lightning strike taking out more equipment than it must. Anybody know about fiber optic and lightning?
I just run Ubuntu Server 18.0.4 LTS on my NAS with the boot/OS drive being a SATA 1TB Samsung SSD. I would agree that the OS performance in relation to the OS drive is not any kind of significant factor for what I do with my NAS. It has 192GB RAM so lack of memory has never been an issue. Sometimes it's nicer to have a faster OS drive when performing OS maintenance and upgrades. They take less time.What do you guys use for your OS on FreeNAS/TrueNAS? A USB flash drive? Conventional 2.5" SSD? A SATADOM? The FreeNAS material used to strongly suggest a USB key (to avoid taking up an unnecessary SATA port, but ServeTheHome argues that USB flash drives may not be particularly reliable. Do you believe that performance of the disk holding the OS is largely irrelevant since most of the OS is just kept in RAM?
I don't know if this will help, I was looking for a utility to write data to fill the drive like you were doing. I ended up finding a tip that recommended using the included windows command line utility called cypher.I just fill them with data then run a chkdsk. One of the three 12tb easy stores ended up giving me bad sector errors when initializing the SHR5, so now I test them for a couple days before shucking.
/W Removes data from available unused disk space on the entire
volume. If this option is chosen, all other options are ignored.
The directory specified can be anywhere in a local volume. If it
is a mount point or points to a directory in another volume, the
data on that volume will be removed.