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 through again OPTIMIZED FOR 4K-SECTOR DRIVES – interesting, but not set up the way I want my system […]
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 1333 (manufacturer page) – $179.99 CPU – Intel Xeon E3-1230 V2 Ivy Bridge 3.3GHz (3.7GHz Turbo) 4 x
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 is on the SLOG. It can be very beneficial if the SLOG is a much faster device
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 according to firmware. 16 # Heads according to firmware. 63 # Sectors according to firmware. S12PNEACB31368P # Disk
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 saw this in demsg: (aprobe3:ahcich5:0:0:0): SETFEATURES ENABLE SATA FEATURE. ACB: ef 10 00 00 00 40 00 00
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 512KB L2 Cache 12MB L3 Cache Socket G34 115W 8-Core Server : $284.99 RAM – Kingston 8GB 240-Pin
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 x 512KB L2 Cache 12MB L3 Cache Socket G34 115W 8-Core Server : $284.99 RAM – Kingston 8GB
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 decided to buy a single drive of two different types and compare them to each other, and to
Abandoning all reason and logic in pursuit of the perfect HDD Read More »
I have been pondering buying some new HDD lately. Price/GB isn’t the only metric. But I did up a list of the short candidates, but before you buy, read below. I should mention all the links below go to Newegg, only because that’s where I was searching. They may not be the best price, but they have a reputation of making sure that links don’t die 6 months after I pasted them. Yeah,
Price / GB for 6 new HDD Read More »
GEOM Watch sent me an email this morning: The status of GEOM MIRROR/gm0 has changed from COMPLETE to DEGRADED. The following components have been lost: ad6 Remaining components: ad3 Here’s the smartctl output: [dan@ngaio:~] $ sudo smartctl -a -i /dev/ad6 smartctl 5.43 2012-06-30 r3573 [FreeBSD 8.2-STABLE i386] (local build) Copyright (C) 2002-12 by Bruce Allen, http://smartmontools.sourceforge.net === START OF INFORMATION SECTION === Model Family: Maxtor DiamondMax Plus 9 Device Model: Maxtor 6Y120M0 Serial
MIRROR/gm0 has changed from COMPLETE to DEGRADED Read More »