| brent timothy saner on 14 Nov 2014 14:04:15 -0800 |
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| Re: [PLUG] Real (driverless) hardware RAID controller for PC? |
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 On 11/14/2014 04:57 PM, Greg Helledy wrote: > I found this howto on bootable RAID1 for CentOS: > > http://wiki.centos.org/HowTos/SoftwareRAIDonCentOS5 > > Unlike the documentation for ClearOS, the CentOS writeup is emphatic > that a RAID1 /boot partition is risky, silly and only for hobbyists. > > However, they outline a method for installing GRUB to both HDs. I > followed it, without fully understanding what I was doing. It worked > (the system is bootable), but I am concerned about the warning that I will: > >> end up with a fragile result that is not updated when a software >> update installs a new kernel. We do NOT recommend it. Years of >> experience demonstrate that is is highly likely that you WILL forget >> to do a bootloader refresh, and run a greater risk of losing data, >> than the theoretical risk of a hard drive failure. it's probably having you install separately to each drive- unable to check the actual howto at the moment. you can use mdadm on /boot just fine, just be sure: 1.) the partitions are set to raid auto-detect 2.) they are formatted with mdadm --metadata=0.90 2. is very important; traditional BIOS booting will not work if the metadata version is above 0.90 due to where the superblocks are placed on the disk. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCgAGBQJUZnxVAAoJEIwATC+TSB9r4zkP/iGmEKPfnzWTo/zgIPEYrZq6 Dkf+rtxcaVS//9Mcb5dSoOIQhfrBy4a/LsU7gwDrfwKwEzixI/EjDIdrAA6iBe4N JAI2pAUzwPfKpKKXRY10mSO4hQEdnuxHXIJT7wEhXj3qAPSwXF8fERjbzGkcbr3Z BjKatNF7xYOsCvOJOaJxWTDsITdvHjepgHtMaVkwGW2jYQjQu0cucXPkUGoRIwKy xHyuOXN4yrvqo1BYXuarRhpoxIEWHLcp2dIifTFfxTpTQ+hC2aRvrluYG3z9xHhF jXMXGBrzoC9CepQ3FULUo2f61hDUu/YGqJ+UPAxU2sqGirqHOni9G3XGss2qkUzm CJYXsyZ3+6enmkkmpJem3XT1ZMkOEMf7vvB3LYQH1FzQXzU9FYSscUXWdgkU8Jk+ 41waLxdDz1StLhdPyXn8RSJVplHTyzCOZ+3sSAMec7xGzCpj1j12l22LOYkzqg8A 9SB76Hdn2QmkOYM8TUDAJUVIMSMddcjgXuBbjjdJLkKslEycS6D0XIQEKiz3qS2I nOW8yA/waN9or8KMYmERgdCHIpUBn0DZAujzsTZfg9VieYQxx7KEnbyFGp0t6eAY fAvJmjnOm0VuMhvtsbPtuhMHZCgZ9h+eyWdlijNvy3H1TcLudOE85Pyzyd9SSVp+ RU3WTeRNMc3o7fidp+mC =/fuX -----END PGP SIGNATURE----- ___________________________________________________________________________ Philadelphia Linux Users Group -- http://www.phillylinux.org Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug