[Bug 13609] New: rsync can be crazy slow on os x 10.13.6 when copying via usb drives
samba-bugs at samba.org
samba-bugs at samba.org
Tue Sep 11 07:06:30 UTC 2018
https://bugzilla.samba.org/show_bug.cgi?id=13609
Bug ID: 13609
Summary: rsync can be crazy slow on os x 10.13.6 when copying
via usb drives
Product: rsync
Version: 3.1.3
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P5
Component: core
Assignee: wayned at samba.org
Reporter: mvolaski at aecom.yu.edu
QA Contact: rsync-qa at samba.org
I am copying files from one USB SATA drive to another connected to a Mac Pro
via USB 3. Rsync should be able to copy approaching 100 MB/second, but it never
copies anywhere near this speed and for a few files, it's so slow as to almost
be stalled, averaging near 131KB/second. The OS is Mac OS 10.13.6 and the rsync
is provided via homebrew.
The command being used is as follows
/usr/local/bin/rsync --acls --archive --delete
--exclude-from=/usr/local/etc/backupignore --sparse --verbose --progress
--xattrs /Volumes/externalhd/ /Volumes/backuphd/external/
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