May 16, 20179 yr 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?
May 16, 20179 yr Author 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, 20179 yr by art-informa.pl
May 17, 20179 yr 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
May 17, 20179 yr Or use SSDs. Lotsa speed, and more reliable than some hacked hardware RAID volume as virtual disk for unRAID. Probably costs less, too.
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