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Category: Hardware

Hardware

Difference between SATA I, SATA II and SATA III

February 12, 2015August 22, 2015 The Geek Decoder

What is the difference between SATA I, SATA II and SATA III? SATA I (revision 1.x) interface, formally known as SATA 1.5Gb/s, is the first generation SATA interface running at 1.5 Gb/s. The bandwidth throughput, which is supported by the…

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Administration Hardware

Smartctl on Linux

November 27, 2014March 16, 2018 The Geek Decoder

SMART (Self-Monitoring, Analysis, and Reporting Technology) allows you to see the status or overall health of a hard drive. This information is instumental in providing warning signs of problems with a hard drive. All Linux distributions provide the smartmontools package,…

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Administration Cron Find Hardware

PHP Sessions causing Error

July 29, 2014August 22, 2015 The Geek Decoder

Currently your messages log is filling up with errors and the system is unstable. Check the message log: $ server# tail -f /var/log/messages Jul 28 08:57:30 mail kernel: EXT4-fs warning (device sda3): ext4_dx_add_entry: Directory index full! Check the sessions directory…

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Hardware

Check disk IO

July 17, 2014August 22, 2015 The Geek Decoder

To check disk IO: dd bs=1M count=512 if=/dev/zero of=test conv=fdatasync 512+0 records in 512+0 records out 536870912 bytes (537 MB) copied, 5.57475 s, 96.3 MB/s

Hardware

Hard Drive Tools

April 17, 2014August 22, 2015 The Geek Decoder

With respect to hard drives, the acronym “SMART” stands for Self-Monitoring, Analysis and Reporting Technology. This was built into many ATA-3 and later ATA, IDE and SCSI-3 hard drives. Basically anything after about 2005 should have it. Ubuntu/Debian: sudo apt-get…

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