- Community Home
- >
- Storage
- >
- Data Protection and Retention
- >
- StoreEver Tape Storage
- >
- Re: 2 x Ultra 160 SDLT 320 on 1 Ultra 320 channel?
StoreEver Tape Storage
1752806
Members
6097
Online
108789
Solutions
Forums
Categories
Company
Local Language
back
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Discussions
Discussions
Forums
Discussions
back
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
Blogs
Information
Community
Resources
Community Language
Language
Forums
Blogs
Topic Options
- 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
10-29-2009 01:13 AM
10-29-2009 01:13 AM
2 x Ultra 160 SDLT 320 on 1 Ultra 320 channel?
Hi,
We currently have an aging ML server which has Backup Exec running. It has two separate Ultra 160 SCSI cards each connected to a HP SDLT 320 drive, it also has a Ultra 320 card connected to a HP Ultrium 960.
We are looking to move this role to a decomissioned HL DL360 G5. The only issue with this box is that it needs fibre connectivity as well as SCSI connectivity.
I have found the following PCIe adapters:
HP STORAGEWORKS U320E SCSI HOST BUS ADAPTER 320MBPS PCI EXPRESS X4 ULTRA320 SCSI STORAGE
HP STORAGEWORKS FC2242SR DUAL PORT 4.24GBPS 4GB FIBRE CHANNEL PCI EXPRESS NETWORK ADAPTER
My question is, if I move the tape drives across, I am going to have to chain the two SDLT 320 devices on a single bus because I only have two channels. Connecting the Ultrium 960 to one, and the two SDLT's to the other...
However, am I right in thinking that the more devices that share a channel, the slower the channel becomes? But then I think that I have 2 Ultra 160 devices on 1 Ultra 320 channel, so in theory I should not lose anything? Or will I because the card will "clock down" to Ultra 160 speed when it determines there are Ultra 160 devices?
Or should I not worry as the burst throughput of the SDLT is 80Mb/s not 160???
Any help would be good on this!
We currently have an aging ML server which has Backup Exec running. It has two separate Ultra 160 SCSI cards each connected to a HP SDLT 320 drive, it also has a Ultra 320 card connected to a HP Ultrium 960.
We are looking to move this role to a decomissioned HL DL360 G5. The only issue with this box is that it needs fibre connectivity as well as SCSI connectivity.
I have found the following PCIe adapters:
HP STORAGEWORKS U320E SCSI HOST BUS ADAPTER 320MBPS PCI EXPRESS X4 ULTRA320 SCSI STORAGE
HP STORAGEWORKS FC2242SR DUAL PORT 4.24GBPS 4GB FIBRE CHANNEL PCI EXPRESS NETWORK ADAPTER
My question is, if I move the tape drives across, I am going to have to chain the two SDLT 320 devices on a single bus because I only have two channels. Connecting the Ultrium 960 to one, and the two SDLT's to the other...
However, am I right in thinking that the more devices that share a channel, the slower the channel becomes? But then I think that I have 2 Ultra 160 devices on 1 Ultra 320 channel, so in theory I should not lose anything? Or will I because the card will "clock down" to Ultra 160 speed when it determines there are Ultra 160 devices?
Or should I not worry as the burst throughput of the SDLT is 80Mb/s not 160???
Any help would be good on this!
1 REPLY 1
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
10-29-2009 04:06 AM
10-29-2009 04:06 AM
Re: 2 x Ultra 160 SDLT 320 on 1 Ultra 320 channel?
Yes, that's possiblen and supportet.
Rules of Ultra wide SCSI is:
Ultra 2, Ultra 3 and Ultra 320. Each device will run at its native speed. But no faster than the max speed of the HBA.
When the hba initalizes, it will check the speed (Protocol) of each device.
The hba will start at its fasts speed. If the device can run at that speed, then that the speed of that device. If it can't. The controller will try the next lower speed.
If you put a fast wide ultra on the bus, the entire bus will run at fast wide ultra speed.
Rules of Ultra wide SCSI is:
Ultra 2, Ultra 3 and Ultra 320. Each device will run at its native speed. But no faster than the max speed of the HBA.
When the hba initalizes, it will check the speed (Protocol) of each device.
The hba will start at its fasts speed. If the device can run at that speed, then that the speed of that device. If it can't. The controller will try the next lower speed.
If you put a fast wide ultra on the bus, the entire bus will run at fast wide ultra speed.
The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation.
News and Events
Support
© Copyright 2024 Hewlett Packard Enterprise Development LP