Anyway, you will probably want to monitor your LSI MPT raid if you find one, so here's how to do it if your distro does not come with the "mpt-status" command:
- Obtain mpt-status from http://freshmeat.net/projects/mptstatus/
- Obtain the X4100 resource CD from Sun. You may have to pay for this. Hopefully you got one with your box. I have an ISO file called X4100_X4200_ResourceCD_4.
- Install the mpt driver from the RPMs on the CD: mptlinux-4.00.05.00-1-rhel5.x86_64.rpm
- Activate the mptctl driver (your distro should have come with mptbase and mpt sas): "/etc/rc3.d/S99fusion.mptctl start". Set up an rc3.d link to start this driver on boot!
- You should see mptctl, mptsas, mptscsih (maybe), and mptbase in the output of lsmod at this point. If not, keep hunting for drivers.
- Also on the Sun CDROM is mptlinux-4.00.05.00-src.tar.gz. Create the directory and extract this source into /tmp/mptlinux-4.00.05.00-src.
- Extract the mpt-status source into /tmp/mpt-status-1.2.0.
- Edit the Makefile with:
KERNEL_PATH := /usr/src/kernels/2.6.18-164.15.1.el5-x86_64/include
CFLAGS := -Iincl -Wall -W -O2 \
- Make and - it works!
# ./mpt-status -i 2
ioc0 vol_id 2 type IM, 2 phy, 67 GB, state OPTIMAL, flags ENABLED
ioc0 phy 1 scsi_id 4 SEAGATE ST973401LSUN72G 0556, 68 GB, state ONLINE, flags NONE
ioc0 phy 0 scsi_id 3 SEAGATE ST973401LSUN72G 0556, 68 GB, state ONLINE, flags NONE
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Once again I am redoing our failed Symantec-Veritas Netbackup installation. There are a few things I'd rather be doing instead, like anything else, but we're going with ZManda this time, so it should be a less painful job this time.
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Anyway, back to DHCP. JunOS just could not handle it. It turned out to be a mix of our fault and theirs. First, in some buildings but not all, the PCs have Windows Firewall blocking ICMP. This always encourages DHCP fail since hosts (clients and server) can't ping each other to see if an address is claimed. Second, JunOS was making a horrible mess of the leases database. Third, we made it worse by specifying week-long lease times. Fourth, the JunOS dhcpd would just dump core form time to time.
Well, after setting lease times short, disabling Windows Firewall, and upgrading to the latest JunOS, we about ready to start more rollouts. Cross our fingers.
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Eventually, we're going to give Symantec Netbackup the finger and move to Amanda, which will enable us to upgrade to OpenSolaris. I posted on Slashdot about this and got a reply from "greg1104":
"People need to understand that SATA disks and chipsets are fundamentally weak at error reporting and recovery. There's only so much you can do about that at the driver or OS level if a problem drives the chipset crazy. You really need hardware optimized for that purpose, like a mature and battle-tested RAID controller."
I agree 100%. For now, ZFS is worth the risk. The box is a virtual tape library, so 100% uptime is not a requirement. I'm not going to start shorting the stock of midrange storage companies just yet.
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