Early NAS Benchmarks

I’m been racking my brain trying to figure out this Synology NAS. I wanted a very simple benchmark, as I don’t need to go into complex workloads.   The problem is that I’m using Synology Hybrid Raid.  From what I can see from mdadm is that Synology created a RAID 5 from two slices of from each 6TB Disk and a RAID 1 from each 3TB Drive, and then RAIDed those two arrays in a RAID6 for 10TB.  It is in interesting way to handle different size disks.

@NAS:/$ sudo mdadm --detail /dev/md2
/dev/md2:
Version : 1.2
Creation Time : Sun Jun 5 14:32:46 2016
Raid Level : raid5
Array Size : 8776306368 (8369.74 GiB 8986.94 GB)
Used Dev Size : 2925435456 (2789.91 GiB 2995.65 GB)
Raid Devices : 4
Total Devices : 4
Persistence : Superblock is persistent

Update Time : Tue Oct 4 16:12:35 2016
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0

Layout : left-symmetric
Chunk Size : 64K

Name : DiskStation:2
UUID : 7bda9cd2:56823007:93f428e6:169ca70e
Events : 1336

Number Major Minor RaidDevice State
4 8 5 0 active sync /dev/sda5
5 8 21 1 active sync /dev/sdb5
2 8 37 2 active sync /dev/sdc5
3 8 53 3 active sync /dev/sdd5
@NAS:/$ sudo mdadm --detail /dev/md3
/dev/md3:
Version : 1.2
Creation Time : Sat Jun 25 05:33:13 2016
Raid Level : raid1
Array Size : 2930246912 (2794.50 GiB 3000.57 GB)
Used Dev Size : 2930246912 (2794.50 GiB 3000.57 GB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent

Update Time : Tue Oct 4 16:19:16 2016
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0

Name : NAS:3 (local to host NAS)
UUID : 57946685:1d64279d:4929b9da:9c01f117
Events : 915

Number Major Minor RaidDevice State
0 8 6 0 active sync /dev/sda6
2 8 22 1 active sync /dev/sdb6

These benchmark speeds are to be expected.  I plan to benchmark the Synology in different RAID Modes as well, but for now, I’ve benchmarked md2 (RAID5), and md1 (RAID1)6

@NAS:/$ sudo hdparm -t /dev/md2
/dev/md2:
Timing buffered disk reads: 422 MB in 3.00 seconds = 140.61 MB/sec

@NAS:/$ sudo hdparm -T /dev/md2

/dev/md2:
Timing cached reads: 1478 MB in 2.00 seconds = 738.35 MB/sec

@NAS:/$ sudo hdparm -t /dev/md1

/dev/md1:
Timing buffered disk reads: 498 MB in 3.04 seconds = 163.86 MB/sec

@NAS:/$ sudo hdparm -T /dev/md1

/dev/md1:
Timing cached reads: 1508 MB in 2.00 seconds = 754.19 MB/sec