I have three APC PDU AP7900 and I’m about to dispose of one of them. I like to wipe the configuration from equipment prior to disposal. I could not recall the login details for any of my three PDUs. Fortunately, I still had the serial cable required to get into the console. I also had my serial cable for my laptop. Getting hold of one of these cables is important if you are […]
APC PDU AP7900 – resetting the password Read More »
This post is about removing the threaded ports from a gender-bender VGA adapter so you can use it with a connector which already has ports. The photos will make it clear what I’m referring to. I recently obtained a KVM switch. This will make sysadmin life at the console easier. Previously, if I needed to be on the console for a given machine, I had to connect the keyboard and monitor cables to
Connecting a M/M VGA cable to a KVM switch using a gender changer Read More »
I haven’t tested this yet, but I’ve installed the hardware. The real test will come after a reboot and actual use of the new drives. NOTE: Although this claims to be creating a new ZIL (SLOG) do not believe it. In fact, stop reading right here. There is nothing of use below. What will they be used for? These drives are intended for ZIL (the ZFS Intent Log). This can speed up writes.
Adding two new drives (SSD) to an existing ZFS system Read More »
This post has been replaced by a newer one. For reference, the previous post on this server is still available. For future reference, this is the slocum server, which I use for various jails and services. This data was gathered adding increasing the RAM from 16GB to 32GB and adding two SSD to the previous configuration. This is my first ZFS system with more than one pool. Merry Christmas The filesystems, well, some
I have this server (I don’t actually have it; I haven’t seen it since 2006) which has started to be restrictive in what I can do with it. It’s running FreeBSD 9.2 and I’d love to start making more use of jails and ZFS. The server has 8x 50G Raptor drives, all on a 3Ware 9550SX-8LP, and 8GB of RAM. The RAM has been giving these types of messages for a few years
Upgrade or replace? Read More »
For future reference, this is the knew server. It runs a few jails, including Bacula regression testing services. The filesytems:
This post has been replaced by a newer one. For future reference, this is the slocum server, which I use for various jails and services:
The traditional thoughts on ZFS are to have arrays which are a power-of-2 when it comes to number of disks. That means 2, 4, 8, etc. But for raidz1, that would be 3, 5, 9. For my choice of raidz2, it would be 4, 6, and 10. In the system I’m building up now, I have an 8-port LSI SATA/SAS 9211-8i 6Gb/s card. I can add two more HDD by attaching them to
ZFS: raidz2 with 8 or 10 disks? Read More »
I noticed this in my logs today: May 22 14:04:39 bast smartd[1577]: Device: /dev/ad0, Failed SMART usage Attribute: 9 Power_On_Hours. Oh. Really? I looked at the output of smartctl and found: This HDD is part of a gmirror: $ gmirror status Name Status Components mirror/gm0 COMPLETE ad0 ad2 How’s ad2 doing? That seems OK. Regardless of the status, I can do nothing for a week. I’m out of town. I do have several
smartctl: FAILING_NOW Read More »