RAID 1 (Mirroring and Duplexing) Comparing mirroring and duplexing Mirroring is the simplest method of avoiding data loss when a single disk fails. During writes, data is sent to both disks. During reads, different data can be read from both disks, which provides good read Performance. Duplexing is another form of keeping a copy of data. Where mirroring uses a single controller, duplexing can also handle a controller failure. Duplexing requires an operating system that supports RAID 1.
This site says cost of tiling per square metre is between $95 and $170 psm for floor tiles and $90 and $160 for wall tiles. Those prices include tiles so take $30 psm off those.
Drylining a wall will cost around Â£15 per square metre plus a skim coat of plaster at around Â£12 per square metre, while doing the same for a ceiling will cost around Â£31 per square metre including skimming.Where an existing wall only requires skimming it should cost around Â£10 - Â£12 per square metre.Wet rendering or plastering should cost around Â£19 - Â£21 per square metre depending on the material used in the plaster. Some older or listed properties may require lime or clay plaster which may cost a little more.here an existing wall only requires skimming it should cost around Â£10 - Â£12 per square metre. Wet rendering or plastering should cost around Â£19 - Â£21 per square metre depending on the material used in the plaster. Some older or listed properties may require lime or clay plaster which may cost a little more.