File Systems

Benchmarking the Samsung SSD 840 PRO Series DXM03B0Q – ZFS

3 Comments / Disks, File Systems, hardware, ZFS / By /

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 […]

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Benchmarking the TOSHIBA DT01ACA300

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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

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Benchmarking the Seagate ST2000DM001

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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

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Aligned versus not aligned

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In this post, we’re going to demonstrate why aligning your disk partitions can be a good idea. For starters, we’re going to go with the default alignment, do a test, then align, and redo the test. But first, in case you have no idea what I’m talking about, this randomly discovered post may be a useful primer. Create the scheme on the disk This command creates a GPT scheme on the drive. Create

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Aligning disk partitions for better throughput

7 Comments / File Systems, FreeBSD, Open Source / By /

During a recent install of FreeBSD 9.1 onto a gmirror, it was pointed out that my disk partitions were not aligned. Today, I’ll look at how that affects performance, both before and after alignment. Last night, I installed FreeBSD 9.1 onto a separate HDD, which I’ll use as a floater. I can attach this HDD to any system I need to work on without booting from the main HDD. In attached this HDD

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cannot open SCSI device ‘/dev/pass11’ – Permission denied

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Right after getting my SCSI cable problems fixed, I was all set to run some Bacula jobs. They immediately started failing: 27-Nov 12:59 bacula-dir JobId 112458: Start Copying JobId 112458, Job=CopyToTape-Diff.2012-11-27_12.58.05_08 27-Nov 12:59 bacula-dir JobId 112458: Using Device “DTL01” 27-Nov 12:59 kraken-sd JobId 112458: Ready to read from volume “DiffAuto-2357” on device “MegaFile” (/storage/compressed/bacula/volumes). 27-Nov 12:59 kraken-sd JobId 112458: 3301 Issuing autochanger “loaded? drive 0” command. 27-Nov 12:59 kraken-sd JobId 112458: 3991 Bad

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Idea from Kris Moore – PC-BSD

2 Comments / File Systems, FreeBSD, Jails, ZFS / By /

I’m sitting in the The Warden – FreeBSD and Linux Jail Management talk at EuroBSDCon 2012. He has mentioned two things, so far, that give me ideas. Evil ideas. Put each jail in a different ZFS data set – this may be useful for my jails running Bacula regression testing Schedule cron jobs to do snapshots on a regular basis – useful for snapshots, which I’m not really using at all And he’s

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What’s using up /usr?

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It seems the /usr partition on my dev box is filling up. But I’m not sure what is eating up the space. So let’s take a snapshot of the space and compare it later. [dan@ngaio:/usr] $ sudo du -c -d 1 . Password: 4 ./.snap 62760 ./bin 37520 ./include 93068 ./lib 184 ./libdata 35384 ./libexec 75109696 ./local 37708 ./sbin 102480 ./share 1103840 ./src 250268 ./compat 376 ./games 4 ./obj 71082728 ./home 3584112 ./ports

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