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Flood göndermek, insanların floodlarını okumak ve diğer insanlarla bağlantı kurmak için sosyal Floodlar ve Flood Yanıtları Motorumuza kaydolun.

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Flood göndermek, insanların floodlarını okumak ve diğer insanlarla bağlantı kurmak için sosyal Floodlar ve Flood Yanıtları Motorumuza giriş yapın.

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3 ve kadim dostu 1 olan sj'yi rakamla giriniz. ( 31 )

Üzgünüz, Flood yazma yetkiniz yok, Flood girmek için giriş yapmalısınız.

Lütfen bu Floodun neden bildirilmesi gerektiğini düşündüğünüzü kısaca açıklayın.

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WDC 14TB Slow sequential write throughput (WDBAMA/WD140EDGZ)

While testing a new WD Easy Store 14TB drive, I’m seeing sequential write performance that is half or less of the sequential read speed. I have not seen such a big difference between read and write throughput in any other drive I’ve tested. Everything seems to indicate the drive is healthy.

Anyone else seeming results like this? The few benchmarks I’ve seen for this drive seem that the read/write performance is much closer.

What I’ve observed:

* Seq. read (1MB blocks) is 160 MB/s averaged across whole drive (240 MB/s “start” of drive – 122 MB/s “end” of drive)
* Seq. write (1MB blocks) is is 80 MB/s whole drive (85 MB/s “start” of drive – 50 MB/s “end” of drive)

Details:

* WDC Easy Store 14 TB model WDBABA, drive is a WD140EDGZ according to smartctl. Drive is in the original enclosure, never opened/shucked.
* The unit is USB attached to an RPi 4 for testing. The sequential read performance seems to indicate is isn’t a USB/host bottleneck. No indication that the RPi 4 CPU is being throttled.
* Unit has been power cycled a number of times.

​

ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x000b 100 100 001 Pre-fail Always – 0
2 Throughput_Performance 0x0004 133 133 054 Old_age Offline – 108
3 Spin_Up_Time 0x0007 083 083 001 Pre-fail Always – 377 (Average 303)
4 Start_Stop_Count 0x0012 100 100 000 Old_age Always – 10
5 Reallocated_Sector_Ct 0x0033 100 100 001 Pre-fail Always – 0
7 Seek_Error_Rate 0x000a 100 100 001 Old_age Always – 0
8 Seek_Time_Performance 0x0004 128 128 020 Old_age Offline – 18
9 Power_On_Hours 0x0012 100 100 000 Old_age Always – 357
10 Spin_Retry_Count 0x0012 100 100 001 Old_age Always – 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always – 10
22 Unknown_Attribute 0x0023 100 100 025 Pre-fail Always – 100
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always – 20
193 Load_Cycle_Count 0x0012 100 100 000 Old_age Always – 20
194 Temperature_Celsius 0x0002 017 017 000 Old_age Always – 54 (Min/Max 21/59)
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always – 0
197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always – 0
198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline – 0
199 UDMA_CRC_Error_Count 0x000a 100 100 000 Old_age Always – 0

SMART Error Log Version: 1
No Errors Logged

Do these drives still have an initial read-after-write verification? When does that turn off? Is it still turned off after a certain number of power cycles?

Suggestions welcome.

Benzer Yazılar

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4 Yorumları

  1. Joining the suggestion to test on a PC.

    RPi is a non-standard setup with more unknown variables at play.

  2. Haven’t ever heard of a HDD failure mode with this symptom. Issue almost certainly rests with your other equipment.

    Not to be overly chastising, but if seems you’ve done almost no troubleshooting. Consider the time required to prove or disprove your hypothesis that it’s the HDD and not the Pi (minutes) versus the time you’re spending branching your troubleshooting off of that unproven assumption (hours, days).

  3. Did you try the same test or different test on another machine to rule out a possible config issue with the Pi?

    Here’s my 14TB EDGZ results: https://i.imgur.com/ybT3fdH.png

  4. Interested to hear if anyone else is seeing the same. I would note that the two drives I bought I ran Crystal Disk Mark and got around 220MB/s on both drives. Faster than the 8TB drives I have in the same server.