art-informa.pl Posted May 16, 2017 Share Posted May 16, 2017 Hi experts. Is there a possibility to have greather write speeds to unraid as single drive writing speed? I mean using cache drive the maximum write speed to undraid is the cache drive speed limit. Aftwerards when cache get's filled it's even worse. What I mean by now is a kind of setup, where raid cards (not flashed) are used for example in the following configuration 1st raid card - 2 VD (VD1 and VD2) out of 8 drives 4x3 TB (stripping) + 4x3TB (stripping) 2nd raid card - 2 VD (VD3 and VD4) out of 8 drives 4x3 TB (stripping) + 4x2TB (stripping) 3rd raid card - 2 VD (VD5 and VD6) out of 8 drives 4x2TB (stripping) + 4x2TB (stripping) afterwards use VD1 as cache drive VD2 as parity drive VD3-VD6 as data drives. IS it possible? Quote Link to comment
art-informa.pl Posted May 16, 2017 Author Share Posted May 16, 2017 (edited) 33 minutes ago, BRiT said: Look into Turbo-Writes. Hi BRiT As I understand turbo wrtite is still limited by single slowest drive in the system becouse that's where the write speed limit kicks-in. Let's make this question simplier: What to do to have parity check More than 100 MB/s ? How to use combined architecture -> hardware raid cards with vd's and the vd's as drives for unraid? Edited May 17, 2017 by art-informa.pl Quote Link to comment
BRiT Posted May 17, 2017 Share Posted May 17, 2017 Use hard drives developed sometime in the past 4 years? I've had Parity Check speeds more than 100 MB/s for nearly 3 years now ever since upgrading from 2TB drives to 4TB drives. Here's my parity check speeds at first using 5 HGST 4TB 7200RPM drives and then with a mix of 3 Seagate 8TG Archive drives with the 5 HGST 4TB 7200rpm. notice the average speed is above 100 MB/s even when adding slow archival drives. 2017-05-01, 21:32:46 18 hr, 32 min, 45 sec 119.8 MB/s OK 2017-04-26, 12:35:31 18 hr, 31 min, 55 sec 119.9 MB/s OK 2017-04-01, 11:43:17 8 hr, 43 min, 16 sec 127.4 MB/s OK Quote Link to comment
bman Posted May 17, 2017 Share Posted May 17, 2017 Or use SSDs. Lotsa speed, and more reliable than some hacked hardware RAID volume as virtual disk for unRAID. Probably costs less, too. Quote Link to comment
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