Am 24.11.2012 16:36, schrieb JD:
So, I have been looking for ways to prevent the drives from going to sleep. Only thing I have found was the option -s in the manpage for hdparm, but it has the "VERY DANGEROUS" phrase tacked to it, but without explanation as to the consequences of the danger
on my permanent running machines since years: /etc/rc.d/rc.local: /sbin/hdparm -B 255 /dev/sda /sbin/hdparm -B 255 /dev/sdb /sbin/hdparm -B 255 /dev/sdc /sbin/hdparm -B 255 /dev/sdd /sbin/hdparm -S 0 /dev/sda /sbin/hdparm -S 0 /dev/sdb /sbin/hdparm -S 0 /dev/sdc /sbin/hdparm -S 0 /dev/sdd
nothing more bad for disks as spinup/spindown on modern operating systems it is unlikely that they are not waking up very often
generally: if i get any messages like you a throw the disk away and insert a new one, these days the price of a disk compared with importance of relieable data is a clear decision