Re: double raid 1 filesystem
On Thu, Jul 19, 2007 at 08:22:40AM -0700, Francesco Pietra wrote: I need more fast-HD space for computational work. I wonder whether by adding a second SATA raid1 (a couple of new disks) to the existing SATA raid1, my home could be spread on the two raid1 systems, as if it were a single disk (or filesystem, if you want). If you use software mirroring, you can do it all (I did it few weeks ago - I added another two 250GB disks to mirror of two 250GB disks, I now have 500GB RAID10). If you use hardware mirroring (if it's not real hardware mirror, switch to software mirror! see http://linux-ata.org/faq-sata-raid.html), if highly depends on what your RAID card(s) can do, or you can simply create software stripe of two HW mirrors, On 20.07.07 08:18, Alex Samad wrote: Also raid 10 - will give you benefits of striping and mirroring, 1 hard drive can fail and the other mirror will keep functioning. RAID10 (shortcut from raid1+0) is strip of mirrors, you maybe thought the other _in_ mirror... (raid0+1, aka mirror of stripes, is also possible, but has much higher probability of failing, when two disks fail) -- Matus UHLAR - fantomas, [EMAIL PROTECTED] ; http://www.fantomas.sk/ Warning: I wish NOT to receive e-mail advertising to this address. Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. Quantum mechanics: The dreams stuff is made of. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
double raid 1 filesystem
I need more fast-HD space for computational work. I wonder whether by adding a second SATA raid1 (a couple of new disks) to the existing SATA raid1, my home could be spread on the two raid1 systems, as if it were a single disk (or filesystem, if you want). At the moment, on the Tyan S2895 Thunder K8WE, with OS Debian amd64 etch, there is a raid1 arrangement made with two WD Raptor 150GB each. That affords 100GB free space for collecting data. If I had to rely solely on the 150BG of a second, new, raid1, space would be insufficient. I need to have 100 + 150GB. Raptor HDs exist at 150GB max size. On the other hand, 300GB Maxtor initially installed proved to be incompatible with the board components, resulting, from time to time, in memory corruption. Disks were reconstructed by the raid1, though the job was lost. In those instances jobs were already running since ca one month. Thanks francesco pietra Need a vacation? Get great deals to amazing places on Yahoo! Travel. http://travel.yahoo.com/ -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: double raid 1 filesystem
On Thu, Jul 19, 2007 at 08:22:40AM -0700, Francesco Pietra wrote: I need more fast-HD space for computational work. I wonder whether by adding a second SATA raid1 (a couple of new disks) to the existing SATA raid1, my home could be spread on the two raid1 systems, as if it were a single disk (or filesystem, if you want). what exactly is your question here? yes you can add more disks to your array. but that won't make it faster. unless you're striping in a non-redundant array (raid0?). maybe you'r elooking for something like raid10? where you have striped raid1 devices? yes you can treat it all as one filesystem. At the moment, on the Tyan S2895 Thunder K8WE, with OS Debian amd64 etch, there is a raid1 arrangement made with two WD Raptor 150GB each. That affords 100GB free space for collecting data. If I had to rely solely on the 150BG of a second, new, raid1, space would be insufficient. I need to have 100 + 150GB. Raptor HDs exist at 150GB max size. On the other hand, 300GB Maxtor initially installed proved to be incompatible with the board components, resulting, from time to time, in memory corruption. Disks were reconstructed by the raid1, though the job was lost. In those instances jobs were already running since ca one month. i like seagate drives. There are several out that come with a 5 year. I've got four 160GB disks in my raid5 array and its working very well. A signature.asc Description: Digital signature
Re: double raid 1 filesystem
On Thursday 19 July 2007 08:22, Francesco Pietra wrote: I need more fast-HD space for computational work. I wonder whether by adding a second SATA raid1 (a couple of new disks) to the existing SATA raid1, my home could be spread on the two raid1 systems, as if it were a single disk (or filesystem, if you want). I'd make each RAID1 be an LVM physical volume, combine the two PVs into a volume group, and assign logical volumes (LVs) from that VG. Sounds like you'd want most or all of your space in a single large LV but this gives you flexibility and a convenient path for future growth. --Mike Bird -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: double raid 1 filesystem
On Thu, Jul 19, 2007 at 08:22:40AM -0700, Francesco Pietra wrote: I need more fast-HD space for computational work. I wonder whether by adding a second SATA raid1 (a couple of new disks) to the existing SATA raid1, my home could be spread on the two raid1 systems, as if it were a single disk (or filesystem, if you want). At the moment, on the Tyan S2895 Thunder K8WE, with OS Debian amd64 etch, there is a raid1 arrangement made with two WD Raptor 150GB each. That affords 100GB free space for collecting data. If I had to rely solely on the 150BG of a second, new, raid1, space would be insufficient. I need to have 100 + 150GB. Raptor HDs exist at 150GB max size. On the other hand, 300GB Maxtor initially installed proved to be incompatible with the board components, resulting, from time to time, in memory corruption. Disks were reconstructed by the raid1, though the job was lost. In those instances jobs were already running since ca one month. if you want more speed, get a faster spin hard drive something like a 15K, but you will pay for it. Also raid 10 - will give you benefits of striping and mirroring, 1 hard drive can fail and the other mirror will keep functioning. Thanks francesco pietra Need a vacation? Get great deals to amazing places on Yahoo! Travel. http://travel.yahoo.com/ -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED] signature.asc Description: Digital signature
