Re: [CentOS] CentOS and Dell MD3200i / MD3220i iSCSI w/ multipath -- slightly OT

2011-01-31 Thread Peter Gillich
I forget to describe a non-general solution for I/O errors at boot time. Its the Multi-Path Proxy driver (linuxrdac), which acts as one device. Here is a description: http://linux.dell.com/wiki/index.php/Products/HA/DellRedHatHALinuxCluster/Storage/PowerVault_MD3000/Software BR, Peter On Fri,

Re: [CentOS] CentOS and Dell MD3200i / MD3220i iSCSI w/ multipath -- slightly OT

2011-01-28 Thread Peter Gillich
Hi Ed, The persistent reservation is a SCSI-3 feature. I'ts useful in a cluster environment, where multiple nodes are configured to access a device while at the same time blocking access to other nodes. To disable the iSCSI offload feature, disable the Broadcom iSCSI diver (bnx2i), for example:

Re: [CentOS] CentOS and Dell MD3200i / MD3220i iSCSI w/ multipath -- slightly OT

2011-01-28 Thread Peter Gillich
Ooops, I missed a citation: We normally see these when the target has multiple controllers and one of the controllers is in passive mode where it would normally be used to fail over to, or when one controller is being upgraded or when some management operation is being executed on a controller.

Re: [CentOS] CentOS and Dell MD3200i / MD3220i iSCSI w/ multipath -- slightly OT

2011-01-24 Thread Dr. Ed Morbius
on 07:48 Sun 23 Jan, Peter Gillich (pgill...@gmail.com) wrote: Hi, In last summer, I have had same problems with Dell + CentOS + multipath combination. For example I/O errors and stability problems on the initiator machines. The initator machines are (in a Pacemaker cluster): - Dell R310 -

Re: [CentOS] CentOS and Dell MD3200i / MD3220i iSCSI w/ multipath -- slightly OT

2011-01-22 Thread Rajagopal Swaminathan
Greetings, On 1/22/11, Edward Morbius dredmorb...@gmail.com wrote: CentOS is not a Dell-supported configuration, and we've had little helpful advice from Dell. There's been some amount of FUD in that Dell don't seem to know what Dell's own software installation (the md3 Dell doesn't seem to

Re: [CentOS] CentOS and Dell MD3200i / MD3220i iSCSI w/ multipath -- slightly OT

2011-01-22 Thread Dr. Ed Morbius
on 23:06 Sat 22 Jan, Rajagopal Swaminathan (raju.rajs...@gmail.com) wrote: Greetings, On 1/22/11, Edward Morbius dredmorb...@gmail.com wrote: CentOS is not a Dell-supported configuration, and we've had little helpful advice from Dell. There's been some amount of FUD in that Dell don't

Re: [CentOS] CentOS and Dell MD3200i / MD3220i iSCSI w/ multipath -- slightly OT

2011-01-22 Thread Peter Gillich
Hi, In last summer, I have had same problems with Dell + CentOS + multipath combination. For example I/O errors and stability problems on the initiator machines. The initator machines are (in a Pacemaker cluster): - Dell R310 - Broadcom 5709 Gigabit Ethernet card (4-port) - CentOS 5.4 - 2 Ethernet