Software raid over iSCSI

2008-12-22 Thread Eric
Hello, I'm going to setup a software raid over iSCSI. While I probably should ask my question to the raid people, my guess was someone here might have experience with this. I'm going to use the following topology: There will be 2 storage servers exporting targets. Other physical machines will

Re: Software raid over iSCSI

2008-12-22 Thread Yuri
like this? http://groups.google.com/group/open-iscsi/browse_thread/thread/4caaf406fe8165ab/f021bae5e175ed59#f021bae5e175ed59 2008/12/22 Eric ericvanblokl...@gmail.com Hello, I'm going to setup a software raid over iSCSI. While I probably should ask my question to the raid people, my guess

Re: Software raid over iSCSI

2008-12-22 Thread Eric
Yuri, Assuming the disks used by your raid are targets originating from different servers, then yes. On Dec 22, 11:27 am, Yuri yuri.li...@gmail.com wrote: like this?http://groups.google.com/group/open-iscsi/browse_thread/thread/4caaf4... 2008/12/22 Eric ericvanblokl...@gmail.com

Re: Software raid over iSCSI

2008-12-22 Thread Eric
We'd be using iSCSI Enterprise Target (iscsitarget.sourceforge.net). Ofcourse, the target implementation to use in this setup is open for discussion. On Dec 22, 12:00 pm, Bart Van Assche bart.vanass...@gmail.com wrote: On Mon, Dec 22, 2008 at 11:19 AM, Eric ericvanblokl...@gmail.com wrote:

Re: Software raid over iSCSI

2008-12-22 Thread Ulrich Windl
On 22 Dec 2008 at 2:19, Eric wrote: Hello, I'm going to setup a software raid over iSCSI. While I probably should ask my question to the raid people, my guess was someone here might have experience with this. I'm going to use the following topology: There will be 2 storage servers

Re: Software raid over iSCSI

2008-12-22 Thread Bart Van Assche
On Mon, Dec 22, 2008 at 1:18 PM, Ulrich Windl ulrich.wi...@rz.uni-regensburg.de wrote: I think since ZBR (Zone Bit Recording) the number of sectors per cylinder is variable. thus it makes no sense for any higher-level disk software to try to deal with heads or cylinders. Since ATA (about

Re: Software raid over iSCSI

2008-12-22 Thread Eric
Bart, Thanks for definitive answer and the link to a great thread. I need one more: I have to set the heads and cylinders on the disk partitions of the virtualized servers. Now I assume I also have to set heads and cylinders on the raid partions, exported by the targets. Is this assumption

Re: Software raid over iSCSI

2008-12-22 Thread Bart Van Assche
On Mon, Dec 22, 2008 at 2:17 PM, Eric ericvanblokl...@gmail.com wrote: Thanks for definitive answer and the link to a great thread. I need one more: I have to set the heads and cylinders on the disk partitions of the virtualized servers. Now I assume I also have to set heads and cylinders

Re: Software raid over iSCSI

2008-12-22 Thread Eric
Bart, My use of the term partitions is terrible abuse ofcourse. I mean the CHS layout ofcourse. I've a semi-production test setup where I will apply these changes and see what happens. The setup is far from ideal because if have some cheap-ass 3com switches which don't support jumbo frames or