[Bug 1678112] Re: lvm cache support lost in zesty
This bug is still present in ubuntu 19.04 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1678112 Title: lvm cache support lost in zesty To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1678112/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 500069] Re: since Ubuntu karmic Filetransfer to some USB Drives got realy slow
I have Sandisk Backup U3. (32G). I've tested it on 4 different computers. I had always writing speed around 3MB/s, which is slow, because this pendrive is capable of doing 16-17MB/s writing speed. The only way I'm able to put files faster is to use dd with bs=64 AND oflag=direct. Using these options I have full writing speed. dd if=ubuntu-10.04-server-amd64.iso of=/media/FE35-228F/file.bin bs=64k oflag=direct 10840+1 records in 10840+1 records out 710412288 bytes (710 MB) copied, 43,8788 s, 16,2 MB/s What is also important I can break the copying proccess any time. Without oflag=direct dd ignores Ctrl-C or even kill -9. This was tested on 10.04 and with similar result on "Recovery is Possible" distro (kernel 2.6.34-git16) uname -a Linux fidor 2.6.32-24-generic #38-Ubuntu SMP Mon Jul 5 09:20:59 UTC 2010 x86_64 GNU/Linux Maybe it will help. -- since Ubuntu karmic Filetransfer to some USB Drives got realy slow https://bugs.launchpad.net/bugs/500069 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 500069] Re: since Ubuntu karmic Filetransfer to some USB Drives got realy slow
I've made a typo in my previous comment: you have to specify (at least in my case) bs=64k , not bs=64. Command line example was correct. Any other value, bigger or smaller (32k, 128k, 256k) brings speed down back to 3MB/s. One more thing. I've found second pen drive which is working correctly (full 5MB/s writing speed). There are some small differences in lsusb between those two. I'm attaching lsusb -v output. On the working pen drive (Adata) bs doesn't really matter. Of course with bigger block size, you get bigger writing speed up to 128k. Bigger bs than 128k doesnt change anything. I've tested from 256k up to 2048k, still achieving full writing speed. I'll try to test more USB sticks. ** Attachment added: "lsusb for 2 USB pendrives" http://launchpadlibrarian.net/53126344/lsusb-v.txt -- since Ubuntu karmic Filetransfer to some USB Drives got realy slow https://bugs.launchpad.net/bugs/500069 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
