andynuke

Not from what I can tell. The 2 that had 'Archive' drives in for me came from ebuyer. (i use these as cold storage archives, so I'm not too bothered). Unfortunately, I threw all the empty boxes in the loft but they don't appear to have any external differences. until you shuck the drive. Then it's pretty obvious as they are labelled either Barracuda 'Compute' (these are the ST8000DM004-2CX188) or the 'Archive' drives in the case of the Ebuyer backup plus hubs. I'll drag them all out of the loft tomorrow and see if I can identify a pattern. (y)

In my real world experience. Filling them with 'real' data (mostly terabytes of mkv BluRay Rips), the DM004's are running transfers attached directly to the motherboard at Circa 200MB/s for hour after hour. (inline with the HDtach tests) until the drive geometry starts to slow them down naturally. The SMR Drives would start well, at 160-180 and quite often run out of steam after a few minutes and drop to 30MB/s and never recover? what makes you think the DM004's are SMR? Looking at the seagate 'compute' specs and the performance. I'd be tempted to say otherwise?

Ah Johnnie, just seen this one! I'll confirm I've shucked a dozen of the Backup plus, 10 from Amazon with the DM004 drives in and a couple from ebuyer with the SMR archive drives in. The archive drives are a little slower and drop to 30 MB/s after a minute or so of transfer (due to the re-read buffering and compositing of data ready to rewrite I presume). I can confirm that my DM004 based drives run MUCH faster, and sustain approx 200MB/s for hours and hours at a time (I've filled them up with 'real' data on my workstation before putting them into drive pool service). Whilst there's not much information on these 'compute' drives it seems about right for a modern PMR/TGMR drive spinning at 5240 rpm.

Thanks Perforator. Yep, I'm aware of the heat/throttling issue on M.2. Good to know the Linux driver in unraid can transfer to the RAID-0 cache pool at the full 3GB/s thats perfect for me, as I never usually write more than 100GB/day in large files, so the 'mover' can move them to the drive pool as & when. I'm going to be using 6x Seagate 8TB PMR drives (ST8000DM004) on the Intel 370 Chipset motherboard controller, that are capable of 200MB/s each. Do you know what kind of speed I can expect to the drive pool? I'm a bit of a noob with UnRAID Best I've had to/from a drivepool direct has been the 9261-8i, which on larger transfers (128k+) has been pretty much 1GB/s straight from the spinning rust. (3-400MB/s RAID-6 write though)

A. They were included some time ago, since unRAID v6.2 - Amazing, thanks Johnnie! A. Samba multichannel support is experimental and should be used for testing only, but you can enable it manually on unRAID if you want. - Yep, yep, I'm fully aware when I secure shelled into the Synology OS and modified the config files. I've been testing now for a couple of months before I dump the TeraStations (my go to XFS stalwarts) I've filled the array on the Synology multiple times, both in 'standard' single channel mode and multi-channel mode, in both RAID-5 and RAID-6 BTRFS and ext-4, broken the array and then repaired it, file integrity done with full hash has been perfect. I've run across no issues with multi-channel. I was a little worried about data fragmentation and speed as it is streaming in via 2 separate channels and i wasn't sure how the re-sync and write is done, but I've had 100% success so far. currently in 'testing' mode with 4 different paths. 1) UnRAID on a new Coffee Lake system (NVMe Cache) - 3GB/s Cache pool ?MB/s to drive pool 2) UnRAID on the old workstation (no cache) - ?MB/s to drive pool 3) The Synology 1812+ with BTRFS & Multi-Channel - 160-237MB/s to drive pool (I may try the SSD cache feature to get that to a solid 237MB/s) 4) LSI 9261 & Win on new Coffee Lake system. 1GB/s straight from the drive pool. A. You can schedule parity checks, once a month is recommended. Thanks, I've not started messing with UnRAID yet, the new components are on their way. I kinda thought it would be in there somewhere!

I've shucked over 40 Seagate External drives. 28x4TB + 5TB and 12x8TB. The 4 and 5 TB ones were all PMR drives. The 8TB Backup Plus ones I bought off Amazon were all Seagate 'Compute' PMR drives that run at 200MB/s down to 90MB/s Model number ST8000DM004-2CX188. The 'identical' Backup Plus 8TB ones I bought off Ebuyer were both Seagate SMR 'Archive' drives that run at 180MB/s down to 30MB/s. So they use whatever they have that month I think. But Amazon seem to get the faster 'compute' drives.

Hi. I've used MegaRAID cards for years. I currently Have a 9261-8i at home which has the hardware XOR engine on it (Power PC). These cards are built primarily for rack servers with high airflow, so they suffer a bit in consumer desktop cases. under heavy RAID-6 rebuild with 100% duty cycle allocated to the rebuild process through the MegaRAID Storage Manager. The surface temp of the Heatsink reaches 90-96 dec C, which is a little toasty. I got a 40mm fan and some 30mm screws to fix directly into the heatsink and it drops it to 70 deg c under heavy XOR load.

Hi All. I watched with interest Linustechtips various videos using UnRAID for VM's and storage servers. I'm looking at migrating/amalgamating from various old NAS boxes into a new UnRAID server I Would LOVE to do this with a new UnRAID box with dual 10Gbit card and a super-fast NVMe cache drive. BTRFS RAID-6 (I've no idea why only Synology have this working atm) and preferably multi-Channel SMB 3 (again I've been using this on Synology DSM6 for a while now and it's working flawlessley) 1. Terastation Pro II 8TB - Marvell Orion Arm (500Mhz RISC chip with Hardware RAID-5 XOR engine) using 4x Samsung 204i 2TB drives 2. Terastation Pro II 8TB - Marvell Orion Arm (500Mhz RISC chip with Hardware RAID-5 XOR engine) using 4x Hitachi 7200rpm Drives 3. Terastation Live 8TB - Marvell Orion Arm (500Mhz RISC chip with Hardware RAID-5 XOR engine) using 4x Seagate 7200rpm Drives 4. Synology 414J 20TB - MindSpeed Comcerto 2000 Dual Core 1.2GHz (Hardware RAID XOR) using 5x Seagate 5TB 5400 rpm Drives 5. Synology 1812+ 48TB - Intel Atom D2700 2c/4t CPU with 3GB RAM. using 6x Seagate 'Compute' 8TiB drives 6 Asus P8C-WS i7-2600 48TB w/32GB Ram and LSI MEGARAID 9261-8i (8ooMhz power PC XOR RAID chip). using 6x Seagate 'Compute' 8TB drives I have held onto the TeraStations as 'backups' as they have been bomb-proof and browsing the XFS RAID-5 shares on them has been much more predictable and faster than the Synology DiscStations that I got to replace them even though the transfer rate over is slower (200Mb i.e. 25MiB constant with 4x2TB drives in the TeraStations). The Synology DiscStations have fancier software, but I really don't use them for anything but file-servers. Now using ext4 RAID-5 on both the 1813+ and the 414J has proved to give unpredictable transfer speeds on consistent large BluRay rips, it can range from 20MB/sec to 107MB/Sec and they really slow down when full. Deleting files is a slow process on them. I'm writing this down to a filesystem thing on ext-4 as the much slower 800Mhz CPU's on the TeraStations positivley FLY with XFS. Plus the whole 'SYNOLOCKER' randsomware thing really got me thinking that linux based boxes were really no less of a security target than an average windows PC. I've recently upgraded the drives in my 1812+ to 6 off Seagate Barracuda 'Compute' Drives and done the same in my P8C-WS workstation to compare. The P8C-WS Hardware RAID card is hands down the winner, reaching 1GB/sec, 10x faster than the Synology DiscStations and 40x faster than the TeraStations. I realise that these NAS boxes are basically consumer friendly cheap hardware (atoms and phone SoC's) linked with a nice custom case. Now the question is. I've got £1000 to spend and would really like to upgrade to dual 10Gbit network, so I can move large cache files back and forth at 2GB/s to an NVMe cache using multi-channel SMB. I've been using the latest DiscStation Manager O/S with BTRFS RAID-6 and Multi-Channel SMB 3 for the last couple of months with both Gigabit ports of the 1812+ and it's reaching 2Gbit/s (i.e. 237MB/s) at peak and I've suffered Zero Problems on 30-40 TB's of test data transfer. Here's the basics of my new 'Ultra Performance' UnRAID server idea - ASUS Intel 1151 Socket Z370 Chipset Prime A D4 ATX Motherboard - Intel i3-8100 Processor (3.6Ghz 4C/4T) (I noticed Linus had issues with his 4-channel SMB transfers on a 2 core machine, that went away when 4 cores were used) - Corsair Vengeance LPX 8GB Dual Channel (2x4GB) DDR4 2400MHz - Samsung 250GB NVME EVO SSD Cache Drive, (3.2GB/s Read / 1.5GB/s Write) - 6 off Seagate 'compute' 8TB drives plugged into the onboard SATA 6G ports (or a HBA if they perform better with UnRAID than the onboard?) - Intel X540-T2 Dual 10GBit Network Adapter. - Whatever 16 tray rack case takes my fancy. I'd really like to know: 1) When these 'Tweaks' Linus did to reach 1GB/sec transfer will be rolled into UnRAID? 2) Are there any plans to support Multi-Channel SMB 3.0? to hopefully get that up to 2GB/s dual link? (i've had it working great for 3-4 months using plain Gigabit and it 'just works' on windows 10 and Synology DSM6, no fancy link aggregation bonding configuration or switch required) 3) I'm happy with XFS as it has always 'seemed' more robust on the old TeraStations. Do you support (Patrol Read/Scheduled parity check). Theoretically, I can just install Win 10 with the 9261-8i in this new box, use the NVME as a boot drive and reach the 1GB/s transfer limit of the 6xSeagate raid array. But it WOULD be awesome to use UnRAID and use the NVME as an ultra fast cache and dual channel SMB to hit 2GB/s to and from the box. Sorry for such a long winded and technical first post by the way! Hello Everyone!