Not missing the point, just do not need redundancy. Hardware or software. I do need backup in away that it will become full system mirror/,anytime accessible backup,and ghost clone at the same time. Not concerned about down time. For example when i travel i just pull out mi mirror drive and take it with me. This configuration certainly does not make me feel limited in what i can do with aether drive(s).
It is just a twin on the go. I can even boot from it. Any changes re sync with master drive and rsync does good job only coping the changes. My set up actually uses Hardware RAID0 (2x500gb drives)and then i mirror that to one large hard drive with r sync 1.5tb . Planing to add another 500 gb to RAID0 to make it even faster That is why i do not do RAID for redundancy .Not because it sucks but because I do need different feature available to me. I found this set up to be versatile and safe for mi data,inexpensive ,fast,and shy on resources. On Mon, Jan 11, 2010 at 2:39 PM, Jeremiah Bess <[email protected]> wrote: > That's the other point you are missing, RAID is not a backup, it's > redundancy. I still have a backup script run every day on my home server for > the server configs and files. Ideally, you should have RAID and a backup > solution. The backup is used to restore a system to a previous setup if > things go haywire. RAID is used for data availability, backups are for > integrity and long term availability. > > As for software RAID, that's what I use on my setup, just because it's one > of my old PCs, and does not have a hardware card. I have seen articles and > stats that show software RAID is a tad slower than hardware RAID, but the > performance difference is not much to be concerned about, in my opinion. > > Jeremiah E. Bess > Network Ninja, Penguin Geek, Father of four > > > On Mon, Jan 11, 2010 at 12:18, u4david <[email protected]> wrote: >> >> Not sure about software raid.I did heard good thing about it but >> never implemented. >> As i have no desire to have instant copy,i like delay in mirroring so >> if thinks go wrong before midnight i can recall file from my last >> backup. >> Raid would mirror the undesirable behavior and i would have to keep >> another backups somewhere. >> >> And when my first drive goes bad I still have my mirored system.For me >> this takes care of backup/system mirror/ghoust.If the whole server >> goes down i can just move the drive in any machine and back to full >> system in minutes. using mirror drive in worst case scenario. >> >> I do use hardware raid card and what i learned is that you better have >> to have spare card available of the same kind and other overhead is >> attached to running the raid.It is the only option to cut down down >> time yes but for my personal server needs i can manage down time. >> >> software raid ,hardware raid, rscync miror they are all good for >> something. >> >> I'm happy with my low resources setup. >> >> >> On Mon, Jan 11, 2010 at 2:02 PM, Jeremiah Bess <[email protected]> >> wrote: >> > That's what we've been trying to tell you. With RAID 1 these is not >> > tweaking >> > or cron jobs. It just works. I have RAID 1 running at home on two 250GB >> > HDs. >> > One of them was corrupted after my kids shut the server off uncleanly. >> > RAID >> > was able to rebuild the corrupt drive, no issues. >> > >> > Bottom line: RAID > rsync or scripts. You can't convince any techy >> > anything >> > different. >> > >> > Jeremiah E. Bess >> > Network Ninja, Penguin Geek, Father of four >> > >> > >> > On Mon, Jan 11, 2010 at 11:57, u4david <[email protected]> wrote: >> >> >> >> when i get home i will copy and paste my cron job codes and files. >> >> >> >> Then you will have exact copy of the whole drive. >> >> So when mounted you can access any files mirrored and retrieve them. >> >> >> >> When you need to boot from the mirror you just have to configure grub >> >> and etc fstab accordingly. >> >> As right now the mirror is secondary drive ,so when booting from it >> >> thinks have to be tweaked little to read the right drive/partition. >> >> You can do that before hand.Knowing what sequence the drive will be >> >> etc. >> >> Then you just exclude the fstab from being overwriteen by your backups >> >> so you get to keep your reconfigured files needing to boot. >> >> So when it comes down to use the drive all will be ready to boot. >> >> >> >> >> >> >> >> >> >> On Mon, Jan 11, 2010 at 12:08 PM, cmcanulty <[email protected]> >> >> wrote: >> >> > Could you post the code to drive and >> >> > pull just certain backup when needed. >> >> > Also that I can move the drive in any server(regardless of disk >> >> > controller type) and have instant duplicate running in minutes.Thank >> >> > you >> >> > >> >> > On Jan 10, 12:38 pm, Daniel Eggleston <[email protected]> wrote: >> >> >> Forget the controller - use software raid. No hardware costs, works >> >> >> just as >> >> >> well (there's a performance hit at the extreme high end, but even >> >> >> that >> >> >> can >> >> >> be taken out with raid 10 if you need to). Keeping old files that >> >> >> have >> >> >> been >> >> >> deleted may cause issue (say you deleted a program, because it >> >> >> happens >> >> >> to >> >> >> have a security repercussion, and you're waiting on a patch). There >> >> >> is >> >> >> no >> >> >> substitute for taking periodic backups, which will keep old versions >> >> >> of >> >> >> all >> >> >> files in the case of accidental change/deletion in a much more >> >> >> reliable >> >> >> manner. >> >> >> >> >> >> >> >> >> >> >> >> On Sun, Jan 10, 2010 at 11:34 AM, u4david <[email protected]> wrote: >> >> >> > agree, >> >> >> > what I like about rsync is that I can go in the mirrored drive and >> >> >> > pull just certain backup when needed. >> >> >> > Also that I can move the drive in any server(regardless of disk >> >> >> > controller type) and have instant duplicate running in minutes. >> >> >> >> >> >> > my cron job mounts the dive first then mirrors the data,then >> >> >> > unmount >> >> >> > the >> >> >> > drive. >> >> >> > Also rsync further with out the --delete option to keeps old files >> >> >> > that may have been deleted on master drive. >> >> >> >> >> >> > On Sat, Jan 9, 2010 at 10:33 PM, Jeremiah Bess >> >> >> > <[email protected]> >> >> >> > wrote: >> >> >> > > Not true. RAID 1 is instantaneous mirroring. rsync runs only >> >> >> > > when >> >> >> > > you set >> >> >> > it >> >> >> > > to. RAID 1 is really easy to set up and reliable. >> >> >> >> >> >> > > Jeremiah E. Bess >> >> >> > > Network Ninja, Penguin Geek, Father of four >> >> >> >> >> >> > > On Sat, Jan 9, 2010 at 20:10, u4david <[email protected]> wrote: >> >> >> >> >> >> > >> I would set up firts harddrive: >> >> >> >> >> >> > >> and then second hard drive set up us a mirror of the first >> >> >> > >> drive . >> >> >> > >> use rsync,cronjob. >> >> >> >> >> >> > >> This way no need for raid. >> >> >> > >> But have backups at your finger tips. >> >> >> > >> and if the first disc fails just reconfigure the mirror as >> >> >> > >> "master" >> >> >> > >> and adjust boot grub options and caboom back to original(last >> >> >> > >> backup >> >> >> > >> version of mirrored rsynced copy) >> >> >> >> >> >> > >> On Sat, Jan 9, 2010 at 8:12 PM, Kari Matthews >> >> >> > >> <[email protected]> >> >> >> > wrote: >> >> >> > >> > Hello, >> >> >> > >> > I have a customer who wants a new server. I convinced him to >> >> >> > >> > go >> >> >> > >> > with >> >> >> > >> > Linux >> >> >> > >> > instead of Windows. He then asked at the end that I put >> >> >> > >> > 2-1TB >> >> >> > >> > drives >> >> >> > in >> >> >> > >> > the >> >> >> > >> > server. I assume the second is for storage b/c they deal >> >> >> > >> > with >> >> >> > >> > pretty >> >> >> > >> > large >> >> >> > >> > files. >> >> >> > >> > In your opinion, what should I do with the second drive? >> >> >> > >> > Should >> >> >> > >> > I put >> >> >> > >> > Linux >> >> >> > >> > on both drives? I was going to do a data partition on the >> >> >> > >> > first >> >> >> > >> > drive >> >> >> > >> > ... >> >> >> > >> > if I did that for both, that would be 4 partitions. What is >> >> >> > >> > the >> >> >> > >> > best >> >> >> > >> > way to >> >> >> > >> > handle this? >> >> >> > >> > I know this is a rather silly question, but I am unsure how >> >> >> > >> > to >> >> >> > >> > best >> >> >> > >> > utilize >> >> >> > >> > the space on the 2nd drive. It's tempting to put it in an >> >> >> > >> > external >> >> >> > >> > casing >> >> >> > >> > and just use it as a backup drive. I don't know. >> >> >> > >> > Opinions welcome, since you're all brilliant. TIA. >> >> >> > >> > ~kari >> >> >> >> >> >> > >> > -- >> >> >> > >> > You received this message because you are subscribed to the >> >> >> > >> > Linux >> >> >> > Users >> >> >> > >> > Group. >> >> >> > >> > To post a message, send email to >> >> >> > >> > [email protected] >> >> >> > >> > To unsubscribe, send email to >> >> >> > >> > [email protected] >> >> >> > >> > For more options, visit our group at >> >> >> > >> >http://groups.google.com/group/linuxusersgroup >> >> >> >> >> >> > >> -- >> >> >> > >> You received this message because you are subscribed to the >> >> >> > >> Linux >> >> >> > >> Users >> >> >> > >> Group. >> >> >> > >> To post a message, send email to >> >> >> > >> [email protected] >> >> >> > >> To unsubscribe, send email to >> >> >> > [email protected] >> >> >> > >> For more options, visit our group at >> >> >> > >>http://groups.google.com/group/linuxusersgroup >> >> >> >> >> >> > > -- >> >> >> > > You received this message because you are subscribed to the >> >> >> > > Linux >> >> >> > > Users >> >> >> > > Group. >> >> >> > > To post a message, send email to >> >> >> > > [email protected] >> >> >> > > To unsubscribe, send email to >> >> >> > [email protected] >> >> >> > > For more options, visit our group at >> >> >> > >http://groups.google.com/group/linuxusersgroup >> >> >> >> >> >> > -- >> >> >> > You received this message because you are subscribed to the Linux >> >> >> > Users >> >> >> > Group. >> >> >> > To post a message, send email to [email protected] >> >> >> > To unsubscribe, send email to >> >> >> > [email protected] >> >> >> > For more options, visit our group at >> >> >> >http://groups.google.com/group/linuxusersgroup >> >> >> >> >> >> -- >> >> >> >> >> >> Daniel >> >> > >> >> > -- >> >> > You received this message because you are subscribed to the Linux >> >> > Users >> >> > Group. >> >> > To post a message, send email to [email protected] >> >> > To unsubscribe, send email to >> >> > [email protected] >> >> > For more options, visit our group at >> >> > http://groups.google.com/group/linuxusersgroup >> >> > >> >> >> >> -- >> >> You received this message because you are subscribed to the Linux Users >> >> Group. >> >> To post a message, send email to [email protected] >> >> To unsubscribe, send email to >> >> [email protected] >> >> For more options, visit our group at >> >> http://groups.google.com/group/linuxusersgroup >> > >> > >> > -- >> > You received this message because you are subscribed to the Linux Users >> > Group. >> > To post a message, send email to [email protected] >> > To unsubscribe, send email to >> > [email protected] >> > For more options, visit our group at >> > http://groups.google.com/group/linuxusersgroup >> > >> >> -- >> You received this message because you are subscribed to the Linux Users >> Group. >> To post a message, send email to [email protected] >> To unsubscribe, send email to [email protected] >> For more options, visit our group at >> http://groups.google.com/group/linuxusersgroup > > > -- > You received this message because you are subscribed to the Linux Users > Group. > To post a message, send email to [email protected] > To unsubscribe, send email to [email protected] > For more options, visit our group at > http://groups.google.com/group/linuxusersgroup >
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