HWraid for GNU/Linux

Setting cache on RAID controller

Real RAID controllers (not those found onboard of mainboards) normally have a battery backed cache (or an ultracapacitor + flash memory "zero maintenance cache") which is used for buffering writes to improve speed. Even if it's battery backed, the individual hard disk write caches need to be turned off, as they are not protected from a powerfail and will just lose all contents in that case.

User tags

corosync git freedos taskset radeon xen alien grub MegaRAID MODx iowait glusterfs tftp in-addr.arpa noop PXE ansible munin Areca drupal storage sysresccd Adaptec equalizer KVM graylog2 lstat limit_conn rkhunter profiling newgrp fail2ban DRBD cgroups sublime java HTTPS shellshock alsa sftp numa boot vlan StorMan tun SpamAssassin cache RT pulseaudio rtsp docker-compose gpg asoundrc dovecot sysctl.conf pacemaker ardour arping xargs xhost /etc/network/interfaces virtualbox nvidia glxinfo mount vtysh gtk replication wget xfs qcow2 tiger bridge HDFS language apt oprofile centos 7 idmapd rsync opcontrol PTR mariadb CPAN chroot apache sg lenny raid debootstrap ipmi cpu NFS htop LSI bscan soa pam gdb lxc cpu usage opreport mkfs routing .htaccess cpanm hdparm chromium Swift arch dhclient kernel jackd Salt ha ip hotplug arp APU nfs4 video elliptics parallel dns openvpn CentOS qemu iptables performance ps X forwarding keyboard sysrq tar security erase raid5 ulimit wordpress groups OpenStack LVM pvmove zRam tool tzdata usb initrd vim fio shorewall docker cluster puppet mysql etch virsh backtrace nginx rpm quagga php exim ddos encrypt lubuntu lts proxy SYN cfq core dump dpkg iostat iops vrrpd scsi SuperMicro tin bind firefox top conntrack mdadm deb gre bug backup exim4 find regex perlbrew slab rtl8723be squeeze debian source AMD route dstat flash dhcp bonding swap fido7 ipmitool 3Ware vrrp leap second sysctl perl bash bacula iSCSI youtube build netfilter ubuntu sysfs OpenSSL ssh su SSD virt-install search