- Community Home
- >
- Servers and Operating Systems
- >
- HPE ProLiant
- >
- ProLiant Servers (ML,DL,SL)
- >
- Re: DL385 USB very very slow
Categories
Company
Local Language
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Discussions
Discussions
Forums
Forums
Discussions
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
- BladeSystem Infrastructure and Application Solutions
- Appliance Servers
- Alpha Servers
- BackOffice Products
- Internet Products
- HPE 9000 and HPE e3000 Servers
- Networking
- Netservers
- Secure OS Software for Linux
- Server Management (Insight Manager 7)
- Windows Server 2003
- Operating System - Tru64 Unix
- ProLiant Deployment and Provisioning
- Linux-Based Community / Regional
- Microsoft System Center Integration
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Community
Resources
Forums
Blogs
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО05-26-2010 03:33 PM
тАО05-26-2010 03:33 PM
DL385 USB very very slow
We're getting about 7 MB/sec writing a 1 gig file to an external USB drive. Same drive on other systems shows 64 MB/sec on small files, 28 MB+ on larger ones.
Drives are connected to the back USB ports.
- Tags:
- usb
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО05-26-2010 05:31 PM
тАО05-26-2010 05:31 PM
Re: DL385 USB very very slow
Do you have multiple USB Ports ?
If YES, then is the problem seen with all the USB Ports ?
Check the BIOS setting for the USB. There would be couple of options like
- USB High Speed -> USB 2.0
- USB Full Speed -> USB 1.0
You BIOS setting should be set to USB High Speed i.e. USB 2.0.
Check whether its already set to USB Full speed and hence causing the problem.
Hope this helps.
Regards,
Murali
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО05-26-2010 05:39 PM
тАО05-26-2010 05:39 PM
Re: DL385 USB very very slow
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО05-26-2010 09:03 PM
тАО05-26-2010 09:03 PM
Re: DL385 USB very very slow
KB949483
KB944704
KB941716
KB925528
KB938136
KB972659
KB918005-v3
KB973618
I uninstalled all USB devices, rebooted, and finally I got decent performance after Windows recreated them.
Same procedure on the 2003 x86 machine (DL385G5) yielded no difference.
Unfortunately, it's the latter machine I really need to copy half a terabyte of data from. Not easy at 7MB/second...
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО05-27-2010 05:28 PM
тАО05-27-2010 05:28 PM
Re: DL385 USB very very slow
There are performance issues that at least one of the USB hotfixes address. But in addition to that, earlier we'd run into the problem of running out of paged kernel memory, delayed write errors, etc. when copying large files over the network. The suggested fix is in KB920739, creating the SystemCacheDirtyPageThreshold key. What Microsoft's documentation doesn't mention is that the lazy writer can only write 1/8 of its dirty page buffer per second. That means that when the threshold is hit, all file I/O is limited to 1/8 of the size, which we'd set to 256MB. 256MB/8 = 8MB/s which coincidentally happens to be the limit of USB 1.1. This doesn't cause a problem normally because the P400's write cache hides the problem well. It only shows up on non-cached I/O (USB and network).
Solution:
* Install the USB hotfixes
* If you've set SystemCacheDirtyPageThreshold, make sure it's at least eight times as fast as your network or USB connection
* Delete all USB devices
* Reboot. Make sure the USB bios setting is set to 2.0 rather than it's default of 1.1.
If you still run out of paged kernel memory with the higher value, the only option is live with slower I/O speeds or switch to the x64 bit version of Windows. It's an architectual problem that can't be fixed in the x86 version.
And now, back to our regularly scheduled database backups...
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО02-22-2013 04:38 PM
тАО02-22-2013 04:38 PM