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.
The costs for tiling although generally priced per square metre do vary not only by region and location but also depending on experience and size of firm. A solo tiler may have a relatively small turn over and not need to charge you VAT for example.he major contributor to cost will be how large the area to be tiled is. Both tiles and tiling costs are usually quoted in a price per square metre and this is the relative cost that needs to be considered.