Am 14.07.2012 12:47, schrieb Roberto Ragusa: > On 07/14/2012 11:55 AM, Robert P. J. Day wrote: >> On Sat, 14 Jul 2012, Heinz Diehl wrote: >> >>> On 14.07.2012, Joe Zeff wrote: >>> >>>> Not swap. If you really need swap, it gets written to over and over, which >>>> isn't exactly the best thing for an SSD. >>> >>> My thoughts were that nowadays, on laptops with a fairly amount of >>> RAM, swap gets mainly used for hibernating, and I think it will be a >>> significant advantage to have the memory image recovered from the >>> fastest disk in the system. >> >> oh, right, *that's* why i want swap. :-) >> > > If your rotating disk will always be connected, you may want to have > a unique VG across both the SSD and the HD, so you can move partitions > across them and have more flexibility. > For example, if you realize to need some more space on a SSD filesystem, > you still have to ability to enlarge the partition into the HD and cope with > a partially-here/partially-there layout. > This road can lead to very interesting tricks, such as having the > journal and metadata on SSD and actual data on HD. and what happens if ONE drive fails? colume groups over different drives are a VERY bad idea as long LVM does not sit on top of a RAID! having as example a LVM over 3 drives makes it 3 times more possible to lose the whole volume groups data if one drive goes down this is the same as for RAID0: do it only if it does not bother you losing your data!
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