Disk safety by mdadm using onboard controller.

[ahold]

Hello,

Today i figured out, my hdd working in mdadm raid have enabled write cache

Enabled	Supported:
	   *	SMART feature set
	    	Security Mode feature set
	   *	Power Management feature set
	   *	Write cache

My onboard sata controller don't have any backup battery cache memory.
Should i disable this write cache to protect my data in case power failure ?

[lcoronato]

I think you can use the command:

# hdparm -options /dev/device

hdparm has many option, you can use:

# hdparm -h

I think that will help you.


Leandro.