Arch Linux

synthead

Member

Registered: 2006-05-09

Posts: 1,337

How to tell which class your Micro SD card is in linux

I'm doing some Android modding stuff, and I want to see how fast my SD card is and what class it is also.  Is there a command I can use to find this information?

byte

Member

From: Düsseldorf (DE)

Registered: 2006-05-01

Posts: 2,046

Re: How to tell which class your Micro SD card is in linux

I don't know of any command, but there should be a sticker on the card or its packaging.
For speed tests, I use 1) hdparm --direct -t /dev/sdX and 2a) ddrescue -d /dev/sdX /dev/null (reading) or 2b) dd if=/dev/zero of=/dev/sdX bs=1M (writing/wiping)

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1000

keenerd

Package Maintainer (PM)

Registered: 2007-02-22

Posts: 647

Website

Re: How to tell which class your Micro SD card is in linux

bonnie++

It will do small file random access reads/writes, one of the biggest factors in how fast an SSD feels.