Last month I wrote about a problem I saw with scsi_id and UDEV in OL5.8. As it screwed up all my UDEV rules is was a pretty important issue for me. It turned out this was due to a mainline security fix (CVE-2011-4127) affecting the latest kernels of both RHEL/OL5 and RHEL/OL6. The comments on the previous post show a couple of workarounds.
- Oracle Scsi & Raid Devices Driver Download For Windows 10 64-bit
- Oracle Scsi Interface
- Oracle Scsi Connect
- Oracle Scsi Types
- Oracle Scsi Definition
- The SCSI interface is used to attach peripheral devices to computers. SCSI interfaces provide for faster data transmission rates (up to 320 megabytes per second in SCSI3) than standard serial and parallel ports.
- All scsi-target-utils users should upgrade to this updated package, which contains a backported patch to correct these issues. All running scsi-target-utils services must be restarted for the update to take effect. Solution Update the affected scsi-target-utils package.
- SCSI 1 & 2 Controller is Paravirtual Add Shared RDM (s) in Physical Compatibility Mode Now that we are aware of the above restrictions, lets add a shared RDM in Physical compatibility mode to 2 VMs as part of an Oracle RAC example using Oracle ASM and ASMLIB and see if we can vMotion the 2 VMs without any failure. The high-level steps are.
Over the weekend I started to update a couple of articles that mentioned UDEV rules (here and here) and noticed the problem had dissapeared. I updated two VMs (OL5.8 and OL6.2) with the latest changes, including the UEK updates and ran the tests again and here’s what I got.
This Oracle tuning tip is part of a series on the different aspects of disk I/O performance and optimization for Oracle databases. This segment addresses tuning the SCSI bus.
So it looked like normal service had been resumed. 🙂 Unfortunately, the MOS Note 1438604.1 associated with this issue is still not public, so I couldn’t tell if this was a unilateral change in UEK, or part of a mainline fix for the previous change.
To check I fired up a CentOS 6.2 VM with the latest kernel updates and switched an Oracle Linux VM to the latest RHEL compatible kernel and did the test on both. As you can see, they both still don’t report the scsi_id for partitions.
It could be the associated fix has not worked through the mainline to RHEL and CentOS yet. I’ll do a bit of digging around to see what is going on here.
Cheers
Tim…
Last month I wrote about a problem I saw with scsi_id and UDEV in OL5.8. As it screwed up all my UDEV rules is was a pretty important issue for me. It turned out this was due to a mainline security fix (CVE-2011-4127) affecting the latest kernels of both RHEL/OL5 and RHEL/OL6. The comments on the previous post show a couple of workarounds.
Over the weekend I started to update a couple of articles that mentioned UDEV rules (here and here) and noticed the problem had dissapeared. I updated two VMs (OL5.8 and OL6.2) with the latest changes, including the UEK updates and ran the tests again and here’s what I got.
Oracle Scsi & Raid Devices Driver Download For Windows 10 64-bit
So it looked like normal service had been resumed. 🙂 Unfortunately, the MOS Note 1438604.1 associated with this issue is still not public, so I couldn’t tell if this was a unilateral change in UEK, or part of a mainline fix for the previous change.
Oracle Scsi Interface
To check I fired up a CentOS 6.2 VM with the latest kernel updates and switched an Oracle Linux VM to the latest RHEL compatible kernel and did the test on both. As you can see, they both still don’t report the scsi_id for partitions.
It could be the associated fix has not worked through the mainline to RHEL and CentOS yet. I’ll do a bit of digging around to see what is going on here.
Oracle Scsi Connect
Cheers
Oracle Scsi Types
Tim…
Oracle Scsi Definition