A few comments... > However, I have long been impatient with the speed of the Mediasonic; > moving or renaming a file can take over a minute while the drives > whir and the lights dance.
Renaming or moving files on the same drive should take fraction of a second regardless of the file size or the speed of connection to it. If this what you really experience, you should consider using mv on a command line. > During the restore from backup the GUI (Nautilus) gave me a popup > with continuous information on the progress, and it reported a steady > 115-116 Mbps transfer rate, so that is apparently the max that my > home ethernet can do. That 100-120MBs is about maximum you can observe over 1Gbs ethernet to a NAS for sequential, large file transfers. Recent Synology NAS`s are capable of that without problem even for RAID5 arrays. Please note - sequential, large file transfers - is the keyword. Once we talk about random or small file access - you are into 40MBs-ish territory even for fast SSDs - no what the speed of connection. See some benchmarks such as: SSDs: https://www.anandtech.com/show/12485/the-plextor-m8v-sata-ssd-rev iew/5 NVMEs: https://www.anandtech.com/show/13254/the-toshiba-xg6-1tb-ssd-rev iew-first-96l-3d-nand/5 > Thinkpad P72 (not yet available in the US) or a P71 that I can buy > right now. Both come with Intel Thunderbolt 3 USB-C ports that are > capable of 40Gbps, compared to the 5Gbps of my USB 3.0 connection or > 3GBps of eSATA. So, connecting to HDD or SSD from single user, single computer at 5Gbs, 10Gbs or even 40Gbs is rather irrelevant. Especially when you consider a laptop which is very limited in what it is capable of compared to a desktop - especially in high bandwidth usage applications. Anyway - large files are mainly media - Encoding a film with x264 proceeds at glacial 5Mbs-ish speed these days. So even if you could encode 5 streams at the same time, you would probably be fine with 1Gbs ethernet to a NAS. Backups are incremental, and do not slow you down, especially if your NAS writes to your DAS directly or between two NAS`s. I assume that you are not watching the backups to make them go faster. :-) --- If we would be talking (= not dreaming) about low cost 4-6 drive Synology NAS with 2.5/5/10Gbs ethernet + $150-ish 8 port 2.5/5/10Gbs switch to go with it - that would be different cup-a-tea. --- Storage is slow, and who likes politics or taxes. Hope it helps, Tomas On Mon, 2018-10-15 at 08:39 -0700, John Jason Jordan wrote: > On Mon, 15 Oct 2018 01:27:31 -0700 > Tomas K <tomas.kuchta.li...@gmail.com> dijo: > > > It seems that it would be safer to have the DAS array attached > > permanently to your NAS and access it over the network. That is if > > your > > NAS has eSATA port. > > > > That way it would be permanently attached like internal drives and > > that > > should avoid these type of synchronization errors - Especially when > > you > > use it as RAID0. > > > > RAID arrays, especially in striping configuration, do not like to > > be > > detached or put to sleep without proper sync and umount. > > The Synology NAS does not have an eSATA port, but it does have a USB > port, so I could probably attach the Mediasonic to it. And I agree > that > doing so might make the connection more stable - the NAS is across > the > room, while the Mediasonic is on my desk where stuff gets moved > around > a bit. However, I have long been impatient with the speed of the > Mediasonic; moving or renaming a file can take over a minute while > the > drives whir and the lights dance. I lust for SSDs to replace the two > WD > Red Pro drives in it, but the cost of 16TB of SSDs always makes me > discard the notion. If I attach the Mediasonic to the Synology I > wonder > about access time compared to its current USB 3 connection. > > During the restore from backup the GUI (Nautilus) gave me a popup > with > continuous information on the progress, and it reported a steady 115- > 116 > Mbps transfer rate, so that is apparently the max that my home > ethernet > can do. > > I have been shopping for a new computer and I'm currently looking at > a > Thinkpad P72 (not yet available in the US) or a P71 that I can buy > right now. Both come with Intel Thunderbolt 3 USB-C ports that are > capable of 40Gbps, compared to the 5Gbps of my USB 3.0 connection or > 3GBps of eSATA. Then again, the WD Red Pro drives are SATA-3, which > are > rated at 6Gbps, so until I go to SSDs there wouldn't be much to gain. > And the only faster enclosures available are Mediasonic rated at > 10Gbps. What would be really cool is 16TB of SSDs mounted inside the > laptop itself. > > > If attaching it permanently to NAS is not an option, autofs with > > reasonable timeout avoiding the DAS power saving mode, instead of > > mount > > in fstab, would probably help too. > > The Synology is mounted by a line in fstab, but not the Mediasonic. I > have thought of doing so, but haven't bothered; it's trivial to mount > it with the GUI. But if doing so can increase access speed I'm all > for > it. > _______________________________________________ > PLUG mailing list > PLUG@pdxlinux.org > http://lists.pdxlinux.org/mailman/listinfo/plug _______________________________________________ PLUG mailing list PLUG@pdxlinux.org http://lists.pdxlinux.org/mailman/listinfo/plug