User Benchmarks

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Parity Check Speeds

Add your Parity Check speeds here, to help others judge if their system is "performing well"

The Drive Count column is the total number of drives you have in your system, not including cache drive. If you system has a cache drive please specify it with a "(1)" behind the total number. Since the cache drive is not figured into the parity check it was decided not to "include" it as a "real" drive but to show that it did exist by adding the "(1)."

Two new columns were added on 4/13/09 to reflect the UnRAID version and if NCQ has been disabled or not. Multiple users have noted discrepancies in parity check and transfer speeds when NCQ is enabled if AHCI mode is used in the BIOS. Others using IDE mode have not seen the discrepancies.

If you would like to estimate what your parity check speed should be, please see "Calculating parity check speeds". Use the revised equation.

If you have upgraded your system and want to update your entry here, please add a new entry immediately below your previous entry, with the updated numbers. Both the old and new entries may be helpful to different users, and it is even more helpful when comparing the two entries, in showing how the changes have affected the parity check speed.

Note: This table should be helpful, but cannot be totally relied upon for a number of reasons - rounding errors, inconsistent conversion of syslog number, grabbing an interim speed instead of final average, user vs system started parity check, etc. A parity check started by the system is usually concurrent with drive mounting and transaction replay, slowing all disk operations down.

Parity Check Benchmarks
Drive Count # of IDE # of SATA Smallest
(in GB)
Largest
(in GB)
Motherboard Controller Cards Average Parity Check Speed (in MB/sec) UnRAID Version Force NCQ disabled
12 12 0 300 500 D865GLCLK 2xPromise TX2 15 4.0 n/a
15 (1) 12 4 300 1000 D865GLCLK 2xPromise TX2 + Adaptec 1205SA 11 & 58 (once past IDE drives) 4.3 IDE mode
14 (1) 2 13 300 1000 P5B VO DO Adaptec 1430A (4D) + SuperMicro AOC-SAT2-MV8 (1D) 44 & 58 (once past 500GB)
3 (1) (1) 3 1500 1500 GA-EP43-UD3L Onboard (6x ICH10 + 1x JMicron) 88.2 4.5b4 Yes/ACHI
5 (1) 1 5 500 750 GA-P35-DS3 Onboard (4x ICH9R & 2x GIGABYTE SATA2) 72
8 0 8 250 500 nForce570 SiI3132-based 51
6 0 6 200 500 D915GAG Promise TX4 54
3 0 3 500 1000 MSI 945GM1 (ITX) Promise TX4(pci) 46 & 57 (once past 500GB)
3 0 3 1000 1000 ABIT AB9 PRO ICH8 Jmicron SiI3132 57
5 0 5 1000 1000 MSI P43 Neo3-F Onboard (6x ICH10 + 2x Jmicron) 73 4.5b4 Yes/AHCI
7 (1) 0 8 500 1000 GA-P35C-DS3R Onboard (6x ICH9 + 2x Gigabyte SATA2 Chip) 59
9 (1) 0 10 750 1500 Asus A8N-SLI Premium Onboard (nVidia4 SATA II & SI 3114R SATA I) + 2xAdaptec 1430SA + Sabrent SATA-PE2P 61.43 w/ 2 750G on PCI SI3114 4.5-b6 IDE mode
4 (1) 0 5 1000 1500 ABIT AB9 Pro Onboard (Intel ICH8R) 83 4.3.3 AHCI
4 (1) 2 2 160 1000 Foxconn 45GMX Onboard (Intel ICH7) 48
3 (1) 0 3 1000 1500 Asus P5K Deluxe Onboard (Intel ICH9R) 78
4 (1) 0 5 250 500 VIA EPIA EN15000G Onboard + Promise TX4 15.5
4 0 4 1500 1500 Asus P5B Deluxe Onboard (Intel ICH8R) 90.9
3 (1) 0 4 1500 1500 Gigabyte GA-MA780G-UD3H Onboard (AMD SB700) 82.9
7 (1) 0 8 500 1500 ABIT AB9 Pro Onboard (6xICH8 + 2xJmicron SiI3132) 53 4.4.2 No
3 0 3 1500 1500 ECS A740GM-M Onboard (AMD SB700) 95.21
4 0 4 1000 1000 Foxconn G31MX-K Onboard (Intel ICH7) 65.65
7 (1) 0 7 1000 1000 SuperMicro C2SBA+II Onboard (Intel ICH9R) 62.56
5 0 5 1500 1500 Gigabyte MA740GM-S2 Onboard (AMD SB700) 76.96 4.5-b6 Yes/ACHI
4 0 4 1000 1000 XFX Geforce 8300 Onboard (nv mcp78u) 79.25 (syslog) 4.5-b6 No/ACHI
6 0 6 500 1000 XFX Geforce 8300 Onboard (nv mcp78u) 65.35 (syslog) 4.5-b6 No/ACHI
6 0 6 500 1000 Abit A-S78H Onboard (AMD SB700) 76.28 (syslog) Yes/Native IDE
3 0 3 1500 2000 Gigabyte MA785G-UD3H Onboard (AMD SB710) 65.73 (syslog) 4.5 ACHI
6 0 6 1000 2000 Gigabyte MA785G-UD3H Onboard (AMD SB710) 62.66 (syslog) 4.5.3 ACHI
3 0 3 2000 3000 ASUS M5A78L-M LX AM3+ Onboard (AMD SB710) 59.84 5.0-b7 ACHI
6 (2) 0 6 2000 3000 ASRock - H97 Performance 2 X Addonics AD4SA6GPX2 (2 x SSD Cache Drives 80gb) WD Reds 105 6.1.8 ACHI
3 (1) 0 3 4000 4000 SuperMicro - X11SSM-F Dell H310 (Flashed to LSI P20 IT Mode) 3 x Hitachi Deskstar NAS 4TB 7200RPM (256 Samsung 850 Pro Cache) 125.3 6.1.9 Yes/AHCI


Hard Drive Read Speeds

Tentative new section, unfinished, for recording read speeds for many drive brands and models. Tentative columns below.

This table may be helpful in comparing the performance of various drives, as long as users are aware that there are many other factors that can affect true performance.

  • Methods to determine speed
    • hdparm -tT /dev/sdX - preferably averaged over 5 times, throwing out any that significantly vary
      • <example of hdparm output here> highlighting the one number we want, the very last number
      • See also Check Harddrive Speed
    • dd if=/dev/sdX of=/dev/null count=8192000
      • <example of dd output here> highlighting the one number we want, the very last number
Manufacturer Model Size (GB) Spin Rate (RPM) Method Speed (MB/s) Notes
Hitachi HD32000 2000 7200 hdparm 122.36 SATA
Hitachi Deskstar 7K2000 2000 7200 hdparm 128.73 SATA, ICH9R, Atom D510
Hitachi Deskstar 7K2000 2000 7200 hdparm 123.34 SATA, ICH9R, Atom D510
Maxtor 6L300R0 300 7200 hdparm 60.9 PATA
Maxtor 7V300F0 500 7200 dd 74.8
Maxtor 7V300F0 500 7200 dd 73.0
Samsung HD501LJ 500 7200 hdparm 84.1
Samsung HD501LJ 500 7200 hdparm 84.5
Samsung HD103UJ 1000 7200 dd 114.0
Samsung Spinpoint F4 HD204UI 2000 5400 hdparm 123.80 SATA, ICH9R, Atom D510
Samsung Spinpoint F4 HD204UI 2000 5400 hdparm 116.98 SATA, ICH9R, Atom D510
Samsung SSD 830 Series 128 0 hdparm 223.87 Using as Cache
Sandisk Cruzer 4 0 dd 24.5
Seagate ST3250823AS 250 7200 hdparm 65.0
Seagate ST3320620AS 320 7200 hdparm 77.4
Seagate ST3400620NS 400 7200 dd 78.5
Seagate ST3500630AS 500 7200 hdparm 74.4
Seagate ST3500630AS 500 7200 hdparm 72.5
Seagate ST31000340AS 1000 7200 dd 106
Seagate ST31500341AS 1500 7200 dd 115
Seagate ST31500341AS 1500 7200 dd 122
Seagate ST31500341AS 1500 7200 dd 82 PCI card, SiI3124
Seagate ST31500541AS 1500 5900 dd 94
Seagate ST32000542AS 2000 5900 dd 125
Seagate ST32000542AS 2000 5900 dd 111 ICH8
Seagate ST32000542AS 2000 5900 dd 84 PCI card, SiI3124
Seagate ST32000542AS 2000 5900 dd 120 PCI-e card, SiI3132
Seagate ST4000DX000 4000 7200 hdparm 178
Seagate ST4000DM000 4000 5900 hdparm 143
WDC WD5000KS-00MNB0 500 7200 dd 73.5
WDC WD5000AAKS-00TMA0 500 7200 dd 85.6
WDC WD5000AAKS-00TMA0 500 7200 dd 83.8
WDC WD7500AAKS-00RBA0 750 7200 dd 96.0
WDC WD10EADS-00M2B0 1000 5400 dd 104.0
WDC WD10EADS-00L5B1 1000 5400 dd 116.0
WDC WD10EACS-00ZJB0 1000 5400 dd 87.3
WDC WD1001FALS-00J7B0 1000 dd 108.5
WDC WD20EADS-00R6B0 2000 5400 dd 104.7
WDC WD20EADS-00R6B0 2000 5400 dd 98.6
WDC WD20EADS-00R6B0 2000 5400 dd 101.7
WDC WD20EADS-00R6B0 2000 5400 dd 100
WDC WD20EARS 2000 5400 hdparm 105.34 SATA, ICH9R, Atom D510


Preclear Times

Tentative new section, unfinished, for recording how long it takes to preclear different drive brands and models. Tentative columns below.

This table may be helpful in setting expectations as to how long it will take to preclear a drive. Obviously, various factors may affect this, such as trying to preclear multiple drives at the same time, especially if they are on a shared bus. Information about the Preclear tool can be found in the UnRAID Add Ons page, Preclear Disk section.

Manufacturer Model Size Time Notes
Hitachi HDS721050DLE630 500GB 5.05 hours (v1.13 pre-clear and OS v5.0 RC5) (Pre:107, Zero:122, Post:53 MB/s)
Hitachi HDT721010SLA360 1TB 13.5 hours Deskstar 7k1000.B (Pre:80, Zero:87, Post:40 MB/s)
Hitachi HD32000 IDK/7K 2TB 17.8 hours only current 7200RPM 2TB drive
Hitachi HDS722020ALA330 2TB 25.5 hours Deskstar 7K2000 7200RPM, avg. time 4 drives
Hitachi HDS5C30 2.0TB 24.9 hours Deskstar 5K3000, v1.13 using -A, OS 4.7, running on ST2000DL003 at same time
Hitachi HDS5C30 2.0TB 24 hours -A, OS 5.0rc8a, running on WD20EFRX 2TB at same time (94MB/s, 98MB/s, 44MB/s)
Hitachi HDS723030ALA640 3TB 36.05 hours drive pulled from Hitachi External Drive
Hitachi HGSTHDN724030ALE640 3TB 28.05 hours Deskstar NAS 7K4000 v1.14 (Pre: 111, Zero 125, Post: 59 MB/s)
Hitachi HDS5C4040ALE630 4TB 46 hours Deskstar 5k4000 (Pre:90, Zero:102, Post:48 MB/s)
Hitachi HDS724040ALE640 4TB 36.3 hours Deskstar 7k4000 (Pre:114, Zero:130, Post:61 MB/s)
Intel SSDSA2BW080G3 80GB 0.79 hours (v1.13 pre-clear and OS v5.0 RC5) (Pre:144, Zero:93, Post:57 MB/s)
Samsung HD753LJ 750GB 12.84 hours (v1.13 pre-clear and OS v5.0 RC5) (Pre:67, Zero:68, Post:31 MB/s)
Samsung F1 HD103UJ 1TB 12.88 hours 7200 RPM model (v1.8 using -A pre-clear and OS v4.7)
Samsung F1 HD103UJ 1TB 13 hours 7200 RPM model (v1.8 using -A pre-clear and OS v4.7)
Samsung F1 HD103UJ 1TB 13.15 hours 7200 RPM model (v1.8 using -A pre-clear and OS v4.7)
Samsung F1 HD103UJ 1TB 13.25 hours 7200 RPM model (v1.8 using -A pre-clear and OS v4.7)
Samsung F3EG HD203WI 2TB 32.38 hours 5400 RPM runs cool
Samsung F4 HD204UI 2TB 25.5 hours 5400 RPM model
Samsung F4 HD204UI 2TB 26 hours w/updated firmware and v1.8 -A pre-clear
Samsung F4 HD204UI 2TB 26 hours w/updated firmware and v1.8 -A pre-clear
Seagate ST3320620AS 320GB 6.1 hours 7200.10 (Pre:55, Zero:60, Post:29 MB/s)
Seagate ST3500630AS 500GB 9.1 hours 7200.10 (Pre:56, Zero:64, Post:30 MB/s)
Seagate ST31000524AS 1TB 10.66 hours Barracuda v1.13 using -A pre-clear and OS v4.7 avg time three cycles (Pre:92, Zero:90, Post:42 MB/s)
Seagate ST31000524AS 1TB 11.52 hours Barracuda (v1.13 using -A pre-clear and OS v4.7 avg time two cycles)
Seagate ST31500541AS 1.5TB 22.3 hours LP 5900RPM model
Seagate ST2000DL003 2TB 24.7 hours LP 5900RPM model
Seagate ST32000542AS 2TB 26.1 hours LP 5900RPM model
Seagate ST2000DL003 2TB 25.1 hours LP 5900RPM, v1.13 using -A, OS 4.7, running on HDS5C30 at same time
Seagate ST2000DM001 2TB 16.2 hours LP 7200RPM, v1.13 using -A, OS 5.0rc8a, avg time of two drives
Seagate ST3000DM001 3TB 23.66 hours LP 7200RPM, v1.13, avg time, two passes
Seagate ST3000DM001 3TB 23.68 hours LP 7200RPM v1.13 avg time over two cycles
Seagate ST3000DM001 3TB 23.88 hours LP 7200RPM, v1.13, OS 5.0Beta6a
Seagate ST3000DM001 3TB 27.58 hours LP 7200RPM, v1.13, OS 4.7 (Pre:121, Zero:109, Post:51 MB/s), avg time, two passes
Seagate ST3000DM001 3TB 21.05 hours 7200RPM, v1.14 (Pre:130, Zero:159, Post:88 MB/s)
Seagate ST4000DX000 4TB 37.26 hours v1.13, OS 5.0-rc11, (Pre:123, Zero:134, Post:55 MB/s)
Seagate ST4000DM000 4TB 38.05 hours v1.13, OS 5.0-rc11, (Pre:116, Zero:132, Post:55 MB/s)
Seagate ST4000DV000 4TB 35.95 hours v1.13, OS 5.0.4, (Pre:125, Zero:118, Post:62 MB/s)
Seagate ST8000AS0002 8TB 71.50 hours v1.15, OS 6.1.9 (Pre:114, Zero:129, Post:63 MB/s)
Western Digital WD1600AAJS 160GB 2.59 hours (v1.13 pre-clear and OS v5.0 RC5) (Pre:73, Zero:76, Post:31 MB/s)
Western Digital WD1600JD 160GB 3.70 hours Caviar Blue (v1.13 pre-clear and OS v4.7)
Western Digital WD2500YD 250GB 5.86 hours Caviar RE (v1.13 pre-clear and OS v4.7)
Western Digital WD3200JS 320GB 7.00 hours Caviar Blue (v1.13 pre-clear and OS v4.7)
Western Digital WD4000AAKS 400GB 7.50 hours Caviar Blue (v1.13 pre-clear and OS v4.7)
Western Digital WD5000AAKS 500GB 8.35 hours Caviar Blue (v1.13 pre-clear and OS v4.7)
Western Digital WD5000AAKS 500GB 8.75 hours Caviar Blue (v1.13 pre-clear and OS v4.7)
Western Digital WD5000AAKS 500GB 5.85 hours Caviar Blue (v1.13 pre-clear and OS v5.0 RC5) (Pre:98, Zero:109, Post:44 MB/s)
Western Digital WD1001FALS 1TB 4.75 hours [1] Caviar Black (v1.13 pre-clear using -n format and OS v4.7)
Western Digital WD1001FALS 1TB 4.75 hours [1] Caviar Black (v1.13 pre-clear using -n format and OS v4.7)
Western Digital WD10EADS 1TB 16.5 hours Caviar Green model avg. time 3 drives
Western Digital WD10EADS 1TB 16.5 hours Caviar Green model avg. time 3 drives
Western Digital WD10FALS 1TB 12.5 hours Caviar Black (v1.8 using -A pre-clear and OS v4.7)
Western Digital WD10FALS 1TB 13 hours Caviar Black (v1.8 using -A pre-clear and OS v4.7)
Western Digital WD1502FAEX 1.5TB 15.09 hours Black model avg time over two cycles
Western Digital WD20EADS 2TB 25.5 hours Caviar Green (v1.11 using -A pre-clear and OS v4.7) avg time over two cycles
Western Digital WD20EADS 2TB 27 hours Caviar Green model avg. time 2 drives
Western Digital WD20EADS 2TB 27.45 hours Caviar Green model avg. time over two cycles
Western Digital WD20EADS 2TB 29 hours Caviar Green
Western Digital WD20EADS 2TB 30 hours Caviar Green (v1.6 using -A pre-clear and OS v4.7)
Western Digital WD20EARS 2TB 25 hours Caviar Green (v1.11 using -A pre-clear and OS v4.7)
Western Digital WD20EARS 2TB 25 hours Caviar Green (v1.11 using -A pre-clear and OS v4.7)
Western Digital WD20EARS 2TB 26 hours Caviar Green (v1.3 using -A pre-clear and OS v4.7)
Western Digital WD20EARS 2TB 26 hours Caviar Green (v1.6 using -A pre-clear and OS v4.7)
Western Digital WD20EARS 2TB 27 hours Caviar Green (v1.11 using -A pre-clear and OS v4.7)
Western Digital WD20EARS 2TB 27 hours (jumpered) Caviar Green model avg. time 2 drives
Western Digital WD20EARS 2TB 29 hours Caviar Green (v1.4 using -A pre-clear and OS v4.7)
Western Digital WD20EARS 2TB 30.1 hours v1.6 using -A pre-clear and OS v4.7 Atom D510 ICH9R
Western Digital WD20EARS 2TB 31.8 hours v1.6 using -A pre-clear and OS v4.7 Atom D510 ICH9R
Western Digital WD20EARX 2TB 21.0 hours v1.13 using -A pre-clear and OS v4.7 avg time two cycles
Western Digital WD20EARX 2TB 21.69 hours v1.13 using -A pre-clear and OS v4.7 avg time two cycles
Western Digital WD20EARX 2TB 22.59 hours v1.13 using -A pre-clear and OS v4.7 avg time two cycles
Western Digital WD20EARX 2TB 23.73 hours v1.13 using -A pre-clear and OS v4.7 avg time two cycles
Western Digital WD20EARX 2TB 26.3 hours v1.13 using -A pre-clear and OS v4.7
Western Digital WD20EARX 2TB 26.5 hours v1.13 using -A pre-clear and OS v4.7
Western Digital WD20EARX 2TB 29 hours v1.13 using -A pre-clear and OS v4.7 AthlonII Neo 1.3GHz
Western Digital WD20EARX 2TB 29.3 hours v1.13 using -A pre-clear and OS v4.7
Western Digital WD20EFRX 2TB 21.5 hours Red, -A, OS 5.0rc8a, same time as HDS5C30 (113 MB/s, 127 MB/s,44 MB/s)
Western Digital WD30EFRX 3TB 24.5 hours Red, -A, OS 5.0rc8a,(pre:138 MB/s, zero:130 MB/s, post:70 MB/s)
Western Digital WD30EFRX 3TB 25.8 hours v1.13 using -A pre-clear and OS v4.7 avg time three cycles (Pre:104, Zero:119, Post:51 MB/s)
Western Digital WD30EFRX 3TB 26.3 hours v1.13 using -A pre-clear and OS v4.7 avg time three cycles (Pre:102, Zero:116, Post:50 MB/s)
Western Digital WD30EFRX 3TB 28.4 hours v1.13 using -A pre-clear and OS v4.7 avg time two cycles (Pre:99, Zero:112, Post:49 MB/s)
Western Digital WD30EFRX 3TB 28.45 hours v1.13 using -A pre-clear and OS v4.7 avg time two cycles (Pre:99, Zero:112, Post:49 MB/s)
Western Digital WD30EFRX 3TB 28.62 hours v1.13 using -A pre-clear and OS v4.7 avg time two cycles
Western Digital WD30EFRX 3TB 28.70 hours v1.13 using -A pre-clear and OS v4.7 avg time two cycles (Pre:97, Zero:110, Post:49 MB/s)
Western Digital WD30EFRX 3TB 28.75 hours v1.13 using -A pre-clear and OS v4.7 avg time two cycles
Western Digital WD30EFRX 3TB 29.3 hours v1.13 using -A pre-clear and OS v4.7 avg time two cycles (Pre:97, Zero:110, Post:49 MB/s)
Western Digital WD30EFRX 3TB 29.3 hours v1.13 using -A pre-clear and OS v4.7 avg time two cycles (Pre:94, Zero:107, Post:48 MB/s)
Western Digital WD30EZRS-11J00B0 3TB 33.8 hours Green (Pre:96, Zero:100, Post:49 MB/s)
Western Digital WD30EZRX-00DC0B0 3TB 30.75 hours Green (Pre:105, Zero:112, Post:54 MB/s)
Western Digital WD80EFZX 8TB 47 hours OS 6.2.4, Plugin v2016.12.24, WD RED (Pre:141, Zero:143, Post:141 MB/s)


  • Note 1: Used -n option (zeroed only, no pre-read or post-read)


Performance Tests and Discussions