1984 – the techblog

(Hopefully) useful various sysadmin and other stuff.

April, 2012

md write-intent bitmap

Few know about a fea­ture that has been intro­duced to md since a few years now: The write-intent bitmap. This might be mainly because it’s not enabled by default (more about why later) and isn’t really vis­i­ble in day-to-day oper­a­tions. So what is it exactly? Taken from md(4): If con­fig­ured, the bitmap is used to record […]