{"id":11296,"date":"2019-10-01T00:07:00","date_gmt":"2019-09-30T22:07:00","guid":{"rendered":"http:\/\/159.69.82.204\/win\/?p=11296"},"modified":"2019-10-01T00:00:49","modified_gmt":"2019-09-30T22:00:49","slug":"windows-10-v1903-is-there-a-speed-drop-during-file-copy","status":"publish","type":"post","link":"https:\/\/borncity.com\/win\/2019\/10\/01\/windows-10-v1903-is-there-a-speed-drop-during-file-copy\/","title":{"rendered":"Windows 10 V1903: Is there a speed drop during file copy?"},"content":{"rendered":"

[German<\/a>]Windows 10 version 1903 might have a problem copying files. The disc load could reach 100%, causing the copy speed to slump. Here is some information about what I know about it so far. <\/p>\n

<\/p>\n

Blog-reader Ismael D. has brought this possible problem in Windows 10 Version 1903 to my attention (thanks for that). So I'll post it in the blog for information. <\/p>\n

Speed drop when copying files<\/h2>\n

It is possible that Windows 10 version 1903 may lose speed when copying files after 10 seconds. The effect is discussed in this forum post<\/a>.  <\/p>\n

\n

Mass file copy speed starts fast but slows down, then fast again<\/p>\n

My laptop had an M2 SSD and a SATA HDD. I bought a SATA SSD to replace the SSD. I copied everything from the HDD to an external USB drive, then physically replaced the HDD with the new SSD and formatted it using Manage-> Disk Management.<\/p>\n

When I copied the files I had backed up to the external USB drive back to the new SSD drive, the file copy stared off fine, but then unexpectedly slowed down after a few tens of seconds. After running at the slow speed for about a minute, it sped up again to full speed. This cycle repeated until the file transfer was finished.<\/p>\n

At first I thought it was the USB HDD, but then I tried with the M2 SSD. This is blazingly fast, so the problem occurs after a significant amount of data has been transferred, but it is there. Initially, the disk usage is low and the transfer speed fast, limited by the slowest disk\/ interface. Then suddenly the disk usage on the internal destination disk will go to 100%, regardless of which drive it is. This causes the transfer speed to slow down to about 10 MB\/s. After a while, the disk usage automatically drops to a low value and the transfer speed goes back to the previous fast speed.
Speeds switch between two values: (ignoring the initial burst of cached speed).<\/p>\n

USB drive to SATA SSD: ~110 MB\/s and ~10 MB\/s (USB drive is HDD, so 110MB\/s is good)
M2 SSD to SATA SSD: ~500 MB\/s and ~10MB\/s
USB drive to M2 SSD: ~110 MB\/s and ~10 MB\/s
SATA SSD to M2 SSD: ~500 MB\/s and ~10MB\/s
The new SSD in question is a Pioneer 1 TB 2.5\" (APS-SL3N-1T).<\/p>\n<\/blockquote>\n

According to the report above, the copy speed will be reduced to ~10MB. After some time the process will recover and the old speed will be reached again. The effect occurs both on an HDD and on the M2 SSD drive. Question: Have any of you observed this behavior before?<\/p>\n

Similar articles:
<\/strong>Windows 10 V1903: Issues with Start menu & IME fixed?<\/a>
Windows10 V1903: Update KB4517211 causes printer issues<\/a>
Windows 10: Issues with Updates KB4522015, KB4522016 \/ KB4517211 (Sept. 2019)<\/a>
Windows 10 V1903: Issues with Update KB4515384 confirmed<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

[German]Windows 10 version 1903 might have a problem copying files. The disc load could reach 100%, causing the copy speed to slump. Here is some information about what I know about it so far.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[463,2],"tags":[47,76],"class_list":["post-11296","post","type-post","status-publish","format-standard","hentry","category-issue","category-windows","tag-issue","tag-windows-10"],"_links":{"self":[{"href":"https:\/\/borncity.com\/win\/wp-json\/wp\/v2\/posts\/11296","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/borncity.com\/win\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/borncity.com\/win\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/borncity.com\/win\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/borncity.com\/win\/wp-json\/wp\/v2\/comments?post=11296"}],"version-history":[{"count":0,"href":"https:\/\/borncity.com\/win\/wp-json\/wp\/v2\/posts\/11296\/revisions"}],"wp:attachment":[{"href":"https:\/\/borncity.com\/win\/wp-json\/wp\/v2\/media?parent=11296"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/borncity.com\/win\/wp-json\/wp\/v2\/categories?post=11296"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/borncity.com\/win\/wp-json\/wp\/v2\/tags?post=11296"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}