# Extremely slow copying **URL:** \ **Category:** Off-Topic\ **Created:** [April 5, 2025, 10:21pm UTC](https://resource.dopus.com/t/extremely-slow-copying/55253 "2025-04-05T22:21:02Z")\ **Posts on this page:** 16\ **Page:** 1
**Author:** ![fkast](https://resource.dopus.com/user_avatar/resource.dopus.com/fkast/32/26108_2.png) [@fkast](https://resource.dopus.com/u/fkast)\ **Post date:** [April 5, 2025, 10:21pm UTC](https://resource.dopus.com/t/extremely-slow-copying/55253/1 "2025-04-05T22:21:02Z")
Hello. i have a Dopus or robocopy job (doesn't matter) from one SSD to another SSD. The job's size is 995MB. why i got 100% disk usage and response time about 3000-5000-12000ms with Kbits of write speed? there's no antivirus on PC that can slow or stop copying... ---
**Author:** ![Hardkorn](https://resource.dopus.com/user_avatar/resource.dopus.com/hardkorn/32/48254_2.png) [@Hardkorn](https://resource.dopus.com/u/Hardkorn)\ **Post date:** [April 5, 2025, 11:48pm UTC](https://resource.dopus.com/t/extremely-slow-copying/55253/2 "2025-04-05T23:48:00Z")
Check with CrystalDiskInfo if the SSDs are ok. > **[CrystalDiskInfo](https://crystalmark.info/en/software/crystaldiskinfo/)** > > About CrystalDiskInfo A HDD/SSD utility software which supports a part of USB, Intel RAID and NVMe. Aoi Edition Standard Edition Shizuku Edition Kurei Kei Edition Download System Requirements OS Windows XP/Vista/7/8/8.1/10/11Windows Server... ---
**Author:** ![fkast](https://resource.dopus.com/user_avatar/resource.dopus.com/fkast/32/26108_2.png) [@fkast](https://resource.dopus.com/u/fkast)\ **Post date:** [April 6, 2025, 1:22am UTC](https://resource.dopus.com/t/extremely-slow-copying/55253/3 "2025-04-06T01:22:35Z")
![image](https://resource.dopus.com/uploads/default/original/3X/1/9/19eab7f9b5528a37f9030fce1ae0968ba3d77255.png) ![image](https://resource.dopus.com/uploads/default/original/3X/f/8/f8f9fc9fd66bb97f4738b044495ae6a77f7c5200.png) ---
**Author:** ![lxp](https://resource.dopus.com/user_avatar/resource.dopus.com/lxp/32/33734_2.png) [@lxp](https://resource.dopus.com/u/lxp)\ **Post date:** [April 6, 2025, 4:01am UTC](https://resource.dopus.com/t/extremely-slow-copying/55253/4 "2025-04-06T04:01:22Z")
QVOs aren't exactly performance monsters, and small files generally result in poor throughput. Robocopy may perform extra steps that further slow down the process. ---
**Author:** ![fkast](https://resource.dopus.com/user_avatar/resource.dopus.com/fkast/32/26108_2.png) [@fkast](https://resource.dopus.com/u/fkast)\ **Post date:** [April 6, 2025, 12:52pm UTC](https://resource.dopus.com/t/extremely-slow-copying/55253/5 "2025-04-06T12:52:49Z")
copying one file of 4-8gb in Dopus takes seconds, then 100% usage and 2000-10000ms response time for 10-20minutes or above... can it be a buffer size issue???? ![image](https://resource.dopus.com/uploads/default/original/3X/0/6/0635cec3a8aac2bb9f35074b9ee3aa7bf0313b5e.png) ---
**Author:** ![fkast](https://resource.dopus.com/user_avatar/resource.dopus.com/fkast/32/26108_2.png) [@fkast](https://resource.dopus.com/u/fkast)\ **Post date:** [April 6, 2025, 12:56pm UTC](https://resource.dopus.com/t/extremely-slow-copying/55253/6 "2025-04-06T12:56:23Z")
i'm copying from QVO (after copying 0% usage) to new WD (100% usage for hours!) ![image](https://resource.dopus.com/uploads/default/original/3X/6/9/692ff6c66763860f218a2e1aa14bde71566329f5.png) 3mins from QVO with such graph and 26min to WD 100%usage. ---
**Author:** ![lxp](https://resource.dopus.com/user_avatar/resource.dopus.com/lxp/32/33734_2.png) [@lxp](https://resource.dopus.com/u/lxp)\ **Post date:** [April 6, 2025, 1:19pm UTC](https://resource.dopus.com/t/extremely-slow-copying/55253/7 "2025-04-06T13:19:03Z")
Yes, definitely odd! 54°C seems unusually high. I’d recommend running checks with CrystalDiskMark, [H2benchw](https://www.heise.de/download/product/h2benchw-3787), and [HD Tune](https://www.hdtune.com). If possible, try swapping SATA cables, ports, and even controllers to isolate the issue. How trustworthy is the WD's vendor? ---
**Author:** ![fkast](https://resource.dopus.com/user_avatar/resource.dopus.com/fkast/32/26108_2.png) [@fkast](https://resource.dopus.com/u/fkast)\ **Post date:** [April 6, 2025, 1:26pm UTC](https://resource.dopus.com/t/extremely-slow-copying/55253/8 "2025-04-06T13:26:06Z")
> [@lxp](#): > > How trustworthy is the WD's vendor? i don't know. first try with it) 54°C in process near to normal. isn't? ---
**Author:** ![lxp](https://resource.dopus.com/user_avatar/resource.dopus.com/lxp/32/33734_2.png) [@lxp](https://resource.dopus.com/u/lxp)\ **Post date:** [April 6, 2025, 1:46pm UTC](https://resource.dopus.com/t/extremely-slow-copying/55253/9 "2025-04-06T13:46:35Z")
Well, the QVO sits at 37°C, and by its own account, the WD isn't doing much 😉 ---
**Author:** ![fkast](https://resource.dopus.com/user_avatar/resource.dopus.com/fkast/32/26108_2.png) [@fkast](https://resource.dopus.com/u/fkast)\ **Post date:** [April 6, 2025, 1:48pm UTC](https://resource.dopus.com/t/extremely-slow-copying/55253/10 "2025-04-06T13:48:23Z")
> [@lxp](#): > > try swapping SATA cables, ports, and even controllers to isolate the issue. Oh, Alexander! You're clever man!))) Thanks a lot! just changed a cable... now 18gb in 1 minute))) ---
**Author:** ![lxp](https://resource.dopus.com/user_avatar/resource.dopus.com/lxp/32/33734_2.png) [@lxp](https://resource.dopus.com/u/lxp)\ **Post date:** [April 6, 2025, 1:53pm UTC](https://resource.dopus.com/t/extremely-slow-copying/55253/11 "2025-04-06T13:53:03Z")
Happy copying! 👍 ---
**Author:** ![fkast](https://resource.dopus.com/user_avatar/resource.dopus.com/fkast/32/26108_2.png) [@fkast](https://resource.dopus.com/u/fkast)\ **Post date:** [April 8, 2025, 10:51am UTC](https://resource.dopus.com/t/extremely-slow-copying/55253/12 "2025-04-08T10:51:23Z")
nope... happy copying ended after two days. now the same behaviour. any ideas? ---
**Author:** ![lxp](https://resource.dopus.com/user_avatar/resource.dopus.com/lxp/32/33734_2.png) [@lxp](https://resource.dopus.com/u/lxp)\ **Post date:** [April 8, 2025, 11:01am UTC](https://resource.dopus.com/t/extremely-slow-copying/55253/13 "2025-04-08T11:01:05Z")
Oh ☹ But no, no new ideas. Try the hardware and software checks I mentioned, starting with whatever is the easiest. ---
**Author:** ![fkast](https://resource.dopus.com/user_avatar/resource.dopus.com/fkast/32/26108_2.png) [@fkast](https://resource.dopus.com/u/fkast)\ **Post date:** [April 8, 2025, 12:25pm UTC](https://resource.dopus.com/t/extremely-slow-copying/55253/14 "2025-04-08T12:25:09Z")
Seems to be a software problem, as same disks on the same PC but another OS works fine. can it be on a low QVO free space? may be less than a 10% of its capacity and an issue repeats. ---
**Author:** ![lxp](https://resource.dopus.com/user_avatar/resource.dopus.com/lxp/32/33734_2.png) [@lxp](https://resource.dopus.com/u/lxp)\ **Post date:** [April 8, 2025, 12:39pm UTC](https://resource.dopus.com/t/extremely-slow-copying/55253/15 "2025-04-08T12:39:00Z")
Low space on SSDs can be problematic, but I thought you were only reading from it - that shouldn't be a problem. A tool I forgot: Samsung's [Magician Software](https://semiconductor.samsung.com/consumer-storage/support/tools) checks the SSD and updates its firmware if necessary. Similar tools for WD are [here](https://support-en.sandisk.com/app/products/product-detailweb/p/279). ---
**Author:** ![Leo](https://resource.dopus.com/user_avatar/resource.dopus.com/leo/32/69732_2.png) [@Leo](https://resource.dopus.com/u/Leo)\ **Post date:** [April 8, 2025, 6:26pm UTC](https://resource.dopus.com/t/extremely-slow-copying/55253/16 "2025-04-08T18:26:17Z")
> [@fkast](#): > > same disks on the same PC but another OS works fine Maybe antivirus, or something like SATA controller drivers. (Assuming the connector or cable isn't intermittent or something, which might explain why it works sometimes but not others, and changing the cable seemed to make it work again for a while.) Could also be heat, or other things accessing the drive at the same time, maybe. (In Opus, that might include columns or thumbnails populating for files on the drive, if you're viewing its folders.)