A New Kind of Home Computer: Windows Home Server Preview
by Ryan Smith on September 4, 2007 1:00 PM EST- Posted in
- Systems
WHS As A Backup Suite
Although Microsoft is offering many features with WHS, it's WHS as a backup suite that is the single biggest feature of the OS. For Microsoft, this is more or less breaking new ground on an industry that is underdeveloped. At the corporate level there are numerous competting backup suites, but at the consumer level that WHS is targeting there's a handful of packages and Windows' own built-in backup system.
What does exist in the consumer space right now either does backups to the local disk, or if it's designed to do remote backups it does so via making whole copies of a disk, neither of which come close to what corporate software can do. WHS's backup abilities as a result are Microsoft's attempts to bring corporate features down to a home user, in line with the entire theme of WHS being a home's first server.
Central to the backup feature of WHS is the WHS Connector package, which serves as both the backup client for the machine and the key piece of software that integrates a machine into a WHS server. Once a new client is connected, the console can be used to configure the backup settings for that individual machine; out of the box all clients are set to backup between 12am and 6am, and most users will only need to enable backups for the new client. The client also has some control over the backup process without using the administrative console, and can initiate a backup at any time. Finally, the connector software allows WHS to keep track of the general health of each client and report on problems such as missing updates.
On the server side, anyone familiar with corporate backup software will undoubtedly find themselves at home with WHS. Along with scheduling backup times and triggering backups, administrators can exclude folders (but not files or file types) on a per-machine basis, view a list of backups, and manually purge old backups. To that extent WHS will also purge old backups automatically based on retention settings. All of this past the first backup is done incrementally to minimize space used and data transferred.
Furthermore, as the developer of Windows, Microsoft gets a strong ace up their sleeve in backup management: the volume shadow copy ability. We've previously talked about this in our Vista review as Microsoft is using it to run Vista's Previous Version feature, and on a server this ability is much more potent. Because WHS can back up the entire contents of a system (including the OS) it will back up a lot of redundant files; with a 10 client limit that's potentially 10 copies of Windows that need to be stored. Volume shadow copy can recognize the redundant clusters making up all those files and only store a single copy, so in a completely homogenous environment WHS will only need to store a single copy of Windows for the entire house.
The benefits of this further extend to user data, as any other duplicate files (e.g. music) will also only be stored a single time. The incremental backups that WHS does further benefit from the cluster level identification as WHS will only need to store the cluster changes of a file whenever a file is changed. Finally all of this is compressed to squeeze out whatever last bit of space savings can be found. All of these abilities due to volume shadow copy results in WHS backups being exceptionally efficient and making it possible to back up several machines with a drive much smaller than their combined drive space.
Facebook
Twitter
RSS
128 Comments
View All Comments
mindless1 - Wednesday, September 5, 2007 - link
Ok, but want kind of soft-raid "needs" windows? I've dealt with several different soft raid controllers and windows official "support" is not needed, except for a management utility application if desired, to show the state of the arrays. While the management utility could be used to rebuild arrays, assign spares, etc, (in some cases), this is only supplimental to what functionality is provided in any typical soft-raid bios.Remember, windows can be installed onto a soft-raided volume. Soft raid doesn't depend on windows. There might be something about WHS that I haven't considered yet that would be a limitation but in general I find the article's conclusion that "not supported" means "won't work" to be odd. I think it more like when a cable ISP tells you that your router isn't "supported" meaning you're just on your own if you do it, they make no guarantee your unique configuration will or won't work.
Let me put it another way, I am wondering if anyone has any example of a soft raid controller that can't be set up prior to OS installation, it's a pretty manditory feature if you want that OS on the RAIDed volume. What remains is a driver support for the controller in windows but any product with a Win2k3 driver should work unless MS has gone and deliberately castrated WHS. Likewise with a soft raid management utility, unless it's using a fancy installer which refuses to install due to not identifying the WHS OS.
What I suspect is that MS simply disabled the OS integral raid functionality which would be used with drives NOT in any kind of raid controller (soft or hardware), raid configuration. If this is the case, someone will probably hack it to regain that functionality, and it might not even be anything more than a registry change needed.
leexgx - Tuesday, September 4, 2007 - link
the idea if WHS is to be easy to useATWindsor - Tuesday, September 4, 2007 - link
And? The simple functions can be easy to use, while at the same time having more advance features available if one turns them on.leexgx - Tuesday, September 4, 2007 - link
i assume thats what the add-ons are for later on when thay get madeif an hdd failes or is about to on WHS it auto start balancing to an other disk thats Online and ok there is allways two copys if its turnd on (duplication)
not not sure how to degrade an disk but i assume it try and move the data off it i know it will if you remove the problem disk Useing WHS connector as its part of the wizard when removeing disks
the idea of WHS is for users who have limited lerning curves (Plug in expect it to work basicly)
nothing stopping you from making RAID 5 on WHS but it not work correctly in WHS connector
mindless1 - Wednesday, September 5, 2007 - link
The problem is that it is not real-time mirroring, since it waits until later to make the second copy, odds are you would end up losing something if a drive fails.I don't understand when people claim the idea here is "easy". What's so hard about plugging in two hard drives, entering a bios menu and assigning the two to an array? That's an order of magnitude easier than becoming accustomed to a new OS, setting it up. If the idea is just plug it in and expect it to work, then you will NOT HAVE that redundant second copy of the data you're implying is sufficient. These are fairly important features on a fileserver, and then if you want dynamic virtualized volumes that would be yet another feature so you can pick what you want to do, just like it is now with other windows versions where it is easy if you just accept the defaults, most basic config., but you don't have to accept the defaults.
leexgx - Wednesday, September 5, 2007 - link
ifas windows home server its an little lame that you cant use the Boot drive on hardware RAID 1 (boot disk for some resone Cant be SCSI drivers){Sata in raid or IDE RAID} as if the boot disk fails thats an big problem as there is no redundancy for it
it more likey work after windows has been installed but its gettings WHS to Boot off an raid array after its been ghosted over all i can see is getting the driver to load up
nope its stored on other disk that has been duplication as long as it has all ready been done if not you lose any new data thats just been put on (it have to be with in last 10secs to 1 min if it was an small file) unlakey that happen
you can take the disks out and mount them as each disk uses norm NTFS file system just needs an drive letter putting on
tynopik - Wednesday, September 5, 2007 - link
> as windows home server its an little lame that you cant use the Boot drive on hardware RAID 1 (boot disk for some resone Cant be SCSI drivers){Sata in raid or IDE RAID} as if the boot disk fails thats an big problem as there is no redundancy for itthat is an annoyance for recovering the WHS, BUT if you were duplicating data, your data is still safe on another drive
> nope its stored on other disk that has been duplication as long as it has all ready been done if not you lose any new data thats just been put on (it have to be with in last 10secs to 1 min if it was an small file) unlakey that happen
it was very difficult to follow what what you're saying, but i think we both have the same understanding of how it works
note i said ALL 3 conditions have to be met
i agree losing primary drive alone will not mess up duplication, UNLESS condition 2 is ALSO met
condition 2 is what you said, it fails before it had a chance to copy to the secondary drive, which i agree is very unlikely
tynopik - Wednesday, September 5, 2007 - link
> The problem is that it is not real-time mirroring, since it waits until later to make the second copy, odds are you would end up losing something if a drive fails.1. it doesn't wait that long, you wouldn't lose much
2. odds are you won't lose anything
don't forget this is the BACKUP system, even if the BACKUP fails, your primary should still be ok.
To lose data 3 conditions would have to be met:
1. Have to lose primary drive in WHS
2. (1) would have to occur in the narrow window between when it being copied to WHS and a duplicate is made onto another HD
3. Have to lose ANOTHER drive in a COMPLETELY DIFFERENT system (the one the file was originally on)
personally i would be more worried about the time between when a file is created/modified on your system and it is copied to WHS in the first place.
Assuming backup runs at night and you create a file in the morning, that's almost a whole working day of exposure when the file is in ONLY one place
> What's so hard about plugging in two hard drives, entering a bios menu and assigning the two to an array?
having to limit yourself to the lowest common denominator of your drives
let's say you have a 200gb, a 200gb and a 400gb drive and you put it in a raid, you're wasting half the capacity of the 400gb. With WHS you could store a full 400gb with duplication.
mindless1 - Thursday, September 6, 2007 - link
Are you joking? I don't know what you think passes for reliable redundancy, but the idea that you're playing "odds" and then relying on a client not failing to keep your fileserver stores intact is crazy.This isn't a "backup", this is a "server", which for many people will be more important than their clients.
Let's say you don't put a 200GB, 300GB and 400GB in a Raid, since you seem to be trying hard to cause a problem then thinking WHS would bail you out of ineptitude. The only thing hard about a server is when people make excuses not to use the time tested proven reliable strategies then try to excuse it with examples of bad choices. It is a very trivial thing to set up a home file server, far far quicker and easier than even a typical desktop WinXP system tweaked for a particular user's preferred environment. Trying to suggest there are problems is a sign you just don't understand this.
For lower cost, any system can be made into a fully redundant fileserver that is more reliable, not in beta OS state, and has more storage until there is at least $360 more spent on drives. This 360 figure comes from 2x the initial $180 projected price of WHS.
WHS will be a good option once 3 things are addressed:
1) The price is too high for the small increase in functionality over what can be added as freeware or very low cost add-on to Win2k or XP.
2) WHS matures more. I didn't run anything mission critical on any MS OS when it first came out, that would be foolish for an important fileshare. That it is derived from Win2K3 bodes well for it, but the very features being suggested as important by some, are the very features that are new enough to still have some beta-release related issues and need patched later.
3) It is limiting in user choice of configuration. As OS is not supposed to tell you what to do, rather enabling you to do what you want to do.
tynopik - Thursday, September 6, 2007 - link
> This isn't a "backup", this is a "server", which for many people will be more important than their clients.if your only/main purpose in getting this is as a server, then yes, perhaps WHS isn't for you
it's most powerful/compelling feature is it's backup system. sure it can do other things, but if you aren't using that then there's not a whole lot of reason to use it
just because backup of clients isn't a big deal to you doesn't mean it isn't a big deal to others
just because WHS doesn't meet YOUR needs doesn't mean it's stupid, it just means it's not for you
for me backing up clients is very critical and WHS looks like a godsend
oh really?
please tell me where i can find a backup system as flexible and powerful as this at no cost
> For lower cost, any system can be made into a fully redundant fileserver that is more reliable, not in beta OS state, and has more storage until there is at least $360 more spent on drives.
tell me which free system provides ALL of the following features and i will gladly jump on board
- autocombine all physical disks into 1 volume
- disks can be any size
- disks can be added or removed at will
- yet still have physical redundancy of files on different drives
- automatically save single instance of identical files/blocks to reduce space wastage
- automatically preserve previous versions
- do live imaging of windows systems that can then be restored from bare metal with just a boot cd and a network connection
sure parts of it can be duplicated for free, but do tell how you would setup something that does ALL that
(just as a quick aside, a basic server just sitting there is going to waste a TON of space backing up multiple windows systems from all the redundant files. Oops, there goes all your extra space)