Do you have Seagate ST2000DM001? This 2TB drives seems OK at straight dd output, but seems absolutely terrible at random output. If you have one, and do not mind this destructive test (IT WILL DESTROY ANY DATA ON THAT DRIVE), please let me know the results. The reason I ask is the very slow results […]
Do you have a Seagate ST2000DM001? Read More »
I have three blogs run on WordPress. Each runs on its own installation of WordPress. Why? Because all the single-install solutions I’ve seen were not very attractive. Convince me otherwise. Following the official instructions, I drew up this set of instructions which work for me. Hopefully, they work for you too. But I’m sure it’d
How I upgrade my WordPress installations Read More »
I started looking around for guides for creating a zfsroot. Here is what I’ve glanced at so far, along with some of my comments. I plan to create an 8 drive array, running raidz2. FreeBSD wiki page – seems OK ZFS-only booting by Ollivier Robert – based on 8.0, but I need to read it
zfsroot guides – which one to use? Read More »
In the previous benchmark of the Seagate ST2000DM001 2TB HDD, I used a AMD Opteron 6128 Magny-Cours 2.0GHz (see the URL for complete details of the system). Today, I’m using a different system. The hardware We are testing on the following hardware: motherboard – SUPERMICRO MBD-X9SCL+-F Micro ATX Server Motherboard LGA 1155 Intel C202 DDR3
Benchmarking the Seagate ST2000DM001 – slower hardware Read More »
Tonight I was reading about ZFS and ZIL devices. I clarified a few things in my mind. ZIL versus SLOG ZFS uses a ZIL (ZFS Intent Log). This can be on the same device as the zpool. If the ZIL is on another device, that device is known as a SLOG (Separate Log). Thus, the
ZIL mirroring no longer vital Read More »
Following on from yesterday’s benchmark, I’m adding in some ZFS tests. All hardware is the same. Of note: $ zdb | grep ashift ashift: 9 $ sudo diskinfo -v ada0 Password: ada0 512 # sectorsize 128035676160 # mediasize in bytes (119G) 250069680 # mediasize in sectors 0 # stripesize 0 # stripeoffset 248085 # Cylinders
Benchmarking the Samsung SSD 840 PRO Series DXM03B0Q – ZFS Read More »
Today, I’ll be benchmarking a Samsung SSD 840 PRO Series DXM03B0Q. I’ve had this for a couple of weeks, but I’ve not been ready for it until today. This drive will not be detected by FreeBSD 9.1-STABLE and before. A relatively recent commit fixed a problem with When I booted with the SSD installed, I
Benchmarking the Samsung SSD 840 PRO Series DXM03B0Q Read More »
Tonight I received a TOSHIBA DT01ACA300 3TB HDD. This is a 7200 RPM SATA III drive. Tests were run with FreeBSD 9.1 in the hardware listed below. The hardware We are testing on the following hardware: motherboard – SUPERMICRO MBD-H8SGL-O ATX Server Motherboard (Supermicro link): $224.99 CPU – AMD Opteron 6128 Magny-Cours 2.0GHz 8 x
Benchmarking the TOSHIBA DT01ACA300 Read More »
I have a Seagate ST2000DM001 sitting in a server. I’ve run some simple tests. Results are below. Tests were run with FreeBSD 9.1 in the hardware listed below. The hardware We are testing on the following hardware: motherboard – SUPERMICRO MBD-H8SGL-O ATX Server Motherboard (Supermicro link): $224.99 CPU – AMD Opteron 6128 Magny-Cours 2.0GHz 8
Benchmarking the Seagate ST2000DM001 Read More »
Yesterday, I was pretty sure I knew what HDD I was going to buy. I was ready to buy 6 new Toshiba 3TB HDD for a ZFS raidz2 array. Then, last night, I decided to do something entirely out of character for people making HDD purchase. I decided to stop reading and start buying. I
Abandoning all reason and logic in pursuit of the perfect HDD Read More »