crookedview Posted January 11, 2016 Share #1 Posted January 11, 2016 I'm running Xpenology in a VMWare 6 ESXi environment with an IBM m1015 RAID controller flashed to LSI firmware in IT (HBA) mode. I have 2 disks (4TB) attached to the controller that are running as Synology Hybrid Raid (SHR) and a single disk (5TB) also attached to the controller that is running in single-disk mode. My read speeds from the SHR configuration are between 80-110MB/s, while the single disk read speeds are usually >110MB/s read speed. Is there something in Xpenology that I can tweak to achieve better SHR read speeds? I thought RAID1 read speeds would be much higher than what I'm getting. I should mention I'm using XPEnoboot 5592.2. Link to comment Share on other sites More sharing options...
andale Posted January 12, 2016 Share #2 Posted January 12, 2016 Did you set up RAID1 (redundancy)? This doesn't give you any speed advantage compared to a single drive. RAID1 = mirroring of 2 (or more disk) There are only 2 choices for a RAID setup when you have 2 drives: RAID0 (striping, this is where you would get more speed at the risk of a total data loss if only one drive crashes) or RAID1. Speed and safety would be RAID10 (which are two RAID0, mirrored) but you would need more disks (minimum 4). Link to comment Share on other sites More sharing options...
F5BJR Posted January 12, 2016 Share #3 Posted January 12, 2016 SHR with only 2 disks is in security mode similar to mirror The speed is the same with only one disk Link to comment Share on other sites More sharing options...
riptopaz Posted January 13, 2016 Share #4 Posted January 13, 2016 crookedview, if you really need need higher speed for IO operation you can use PCI HBA controller like LSI 9211 or LSI 9207. Link to comment Share on other sites More sharing options...
F5BJR Posted January 13, 2016 Share #5 Posted January 13, 2016 hum .. regardless whether the card controller disk speed remains unchanged Link to comment Share on other sites More sharing options...
crookedview Posted January 14, 2016 Author Share #6 Posted January 14, 2016 SHR with only 2 disks is in security mode similar to mirror The speed is the same with only one disk My speeds aren't the same, though . The single disk is faster than the 2-disk SHR array. crookedview, if you really need need higher speed for IO operation you can use PCI HBA controller like LSI 9211 or LSI 9207. I am using a PCIe controller (m1015 flashed to LSI firmware). All 3 drives (2 SHR 1 single disk) are connected to this controller. Did you set up RAID1 (redundancy)? This doesn't give you any speed advantage compared to a single drive. RAID1 = mirroring of 2 (or more disk) There are only 2 choices for a RAID setup when you have 2 drives: RAID0 (striping, this is where you would get more speed at the risk of a total data loss if only one drive crashes) or RAID1. Speed and safety would be RAID10 (which are two RAID0, mirrored) but you would need more disks (minimum 4). Yeah andale, I set up SHR for 2 disks, which from what I read sets the drives up in a RAID 1 array. I was hoping that SHR would perform striped reads between disks (ZFS will stripe reads across disks, writes are mirrored). Link to comment Share on other sites More sharing options...
antihrist2002 Posted January 14, 2016 Share #7 Posted January 14, 2016 crookedview, do you use passthrough for you controller? or RDM for disks? or you a using traditional VMDK? How you check your speed? via LAN? or console? Do you have data on your SHR? Can you delet it and create RAID-0 to check speed? In RAID-0 you must have 200Mb/s and more, if no than controller can be a bottleneck due bad drivers. Or if you using VMDK it can be problems with ESXi. Link to comment Share on other sites More sharing options...
andale Posted January 14, 2016 Share #8 Posted January 14, 2016 Please keep in mind that your HDDs will or may have different R/W speeds compared to the 5TB disk in single mode (don't know how different your HDDs are). AFAIK Synology's SHR doesn't use ZFS (or I missed something). Link to comment Share on other sites More sharing options...
antihrist2002 Posted January 14, 2016 Share #9 Posted January 14, 2016 Synology uses mdadm for RAID, even for SHR. So you can google mdadm RAID1 read perfomance. I made some test. RAID1 do not impruve single-threaded read. Disk2 and Disk9 is SHR You will see speed boost in RAID1 only if you will read two or more different files simultaneously. use RAID10 to boost your single-threaded read. Link to comment Share on other sites More sharing options...
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