I've been using the WD-RED drives for quite some time now, the earliest one I could find records of were WD30EFRX from end 2013. I couldn't complain for many years. Recently I'd redone my TS-1635AX with WD140EFFXs. At first they seemed fine as well, but lately I'm experiencing delays quite often, so I've done some searching here on the forum and tested the drives. I've been able to get some other drives for comparison:
Here are some measurements:
While they perform in idle state acceptable, here on my backup unit without any operation (drives 7 to 9), with 200 MiB/s:
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Enclosure Port Sys_Name Type Size Alias Signature Partitions Model
NAS_HOST 1 /dev/sda SSD:data 232.89 GB M.2 SSD 1 QNAP FLEX 5 Samsung SSD 860 EVO M.2 250GB
NAS_HOST 2 /dev/sdb SSD:data 232.89 GB M.2 SSD 2 QNAP FLEX 5 Samsung SSD 860 EVO M.2 250GB
NAS_HOST 3 /dev/sdh SSD:data 223.58 GB SSD 1 QNAP FLEX 5 SanDisk SSD PLUS 240GB
NAS_HOST 4 /dev/sdi SSD:data 223.58 GB SSD 2 QNAP FLEX 5 SanDisk SSD PLUS 240GB
NAS_HOST 5 /dev/sdj SSD:data 223.58 GB SSD 3 QNAP FLEX 5 SanDisk SSD PLUS 240GB
NAS_HOST 6 /dev/sdk SSD:data 223.58 GB SSD 4 QNAP FLEX 5 SanDisk SSD PLUS 240GB
NAS_HOST 7 /dev/sdg HDD:data 12.73 TB Disk 1 QNAP FLEX 5 WDC WD140EFFX-68VBXN0
NAS_HOST 8 /dev/sdf HDD:data 12.73 TB Disk 2 QNAP FLEX 5 WDC WD140EFFX-68VBXN0
NAS_HOST 9 /dev/sde HDD:data 12.73 TB Disk 3 QNAP FLEX 5 WDC WD140EFFX-68VBXN0
NAS_HOST 10 /dev/sdd HDD:data 9.10 TB Disk 4 QNAP FLEX 5 WDC WD100EFAX-68LHPN0
NAS_HOST 11 /dev/sdc HDD:data 9.10 TB Disk 5 QNAP FLEX 5 WDC WD100EFAX-68LHPN0
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Enclosure Port Sys_Name Throughput RAID RAID_Type RAID_Throughput Pool
NAS_HOST 1 /dev/sda 536.62 MB/s /dev/md1 RAID 1 1.04 GB/s 1
NAS_HOST 2 /dev/sdb 536.56 MB/s /dev/md1 RAID 1 1.04 GB/s 1
NAS_HOST 3 /dev/sdh 381.41 MB/s /dev/md2 RAID 6 958.21 MB/s 2
NAS_HOST 4 /dev/sdi 371.33 MB/s /dev/md2 RAID 6 958.21 MB/s 2
NAS_HOST 5 /dev/sdj 370.67 MB/s /dev/md2 RAID 6 958.21 MB/s 2
NAS_HOST 6 /dev/sdk 372.33 MB/s /dev/md2 RAID 6 958.21 MB/s 2
NAS_HOST 7 /dev/sdg 206.51 MB/s /dev/md3 RAID 6 514.13 MB/s 2
NAS_HOST 8 /dev/sdf 199.64 MB/s /dev/md3 RAID 6 514.13 MB/s 2
NAS_HOST 9 /dev/sde 213.33 MB/s /dev/md3 RAID 6 514.13 MB/s 2
NAS_HOST 10 /dev/sdd 198.06 MB/s /dev/md3 RAID 6 514.13 MB/s 2
NAS_HOST 11 /dev/sdc 191.68 MB/s /dev/md3 RAID 6 514.13 MB/s 2
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Enclosure Port Sys_Name Type Size Alias Signature Partitions Model
NAS_HOST 1 /dev/sda SSD:data 1.82 TB M.2 SSD 1 QNAP FLEX 5 Samsung SSD 860 EVO M.2 2TB
NAS_HOST 2 /dev/sdb SSD:data 1.82 TB M.2 SSD 2 QNAP FLEX 5 Samsung SSD 860 EVO M.2 2TB
NAS_HOST 3 /dev/sdl SSD:data 465.76 GB SSD 1 QNAP FLEX 5 Samsung SSD 860 EVO 500GB
NAS_HOST 4 /dev/sdm SSD:data 465.76 GB SSD 2 QNAP FLEX 5 Samsung SSD 860 EVO 500GB
NAS_HOST 5 /dev/sdn SSD:data 465.76 GB SSD 3 QNAP FLEX 5 Samsung SSD 860 EVO 500GB
NAS_HOST 6 /dev/sdo SSD:data 465.76 GB SSD 4 QNAP FLEX 5 Samsung SSD 860 EVO 500GB
NAS_HOST 7 /dev/sdk HDD:data 16.37 TB Disk 1 QNAP FLEX 5 Seagate ST18000NM000J-2TV103
NAS_HOST 8 /dev/sdj HDD:data 16.37 TB Disk 2 QNAP FLEX 5 Seagate ST18000NM000J-2TV103
NAS_HOST 9 /dev/sdi HDD:data 16.37 TB Disk 3 QNAP FLEX 5 Seagate ST18000NM000J-2TV103
NAS_HOST 10 /dev/sdh HDD:data 12.73 TB Disk 4 QNAP FLEX 5 WDC WD140EFFX-68VBXN0
NAS_HOST 11 /dev/sdg HDD:data 12.73 TB Disk 5 QNAP FLEX 5 WDC WD140EFFX-68VBXN0
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Enclosure Port Sys_Name Throughput RAID RAID_Type RAID_Throughput Pool
NAS_HOST 1 /dev/sda 535.76 MB/s /dev/md1 RAID 1 1.00 GB/s 1
NAS_HOST 2 /dev/sdb 532.37 MB/s /dev/md1 RAID 1 1.00 GB/s 1
NAS_HOST 3 /dev/sdl 480.19 MB/s /dev/md2 RAID 6 1.58 GB/s 2
NAS_HOST 4 /dev/sdm 482.21 MB/s /dev/md2 RAID 6 1.58 GB/s 2
NAS_HOST 5 /dev/sdn 477.38 MB/s /dev/md2 RAID 6 1.58 GB/s 2
NAS_HOST 6 /dev/sdo 483.58 MB/s /dev/md2 RAID 6 1.58 GB/s 2
NAS_HOST 7 /dev/sdk 235.60 MB/s /dev/md3 RAID 6 203.36 MB/s 2
NAS_HOST 8 /dev/sdj 252.00 MB/s /dev/md3 RAID 6 203.36 MB/s 2
NAS_HOST 9 /dev/sdi 243.60 MB/s /dev/md3 RAID 6 203.36 MB/s 2
NAS_HOST 10 /dev/sdh 108.21 MB/s /dev/md3 RAID 6 203.36 MB/s 2
NAS_HOST 11 /dev/sdg 99.39 MB/s /dev/md3 RAID 6 203.36 MB/s 2
Regarding the latest WD disasters with CMR/SMR and 5700-RPM-class and the longstanding MTBF of 1E14. Are there any pros left I'm currently missing in comparison to all the other drives out there?