News

Once a business has settled on the right server technology and understands the benefits of installing quality hardware that will perform all day and all night for years to come, it is tempting to look for opportunities to save money on secondary storage like the hardware around the chosen backup solution.

Considered from a perspective where everything is running just fine, cheaper backup hardware seems like a great area to trim cost. When the inevitable happens (IT engineers quickly learn that all hardware is going to fail sooner or later) your backup becomes a vital lifeline to get the business back on its feet again quickly.

Let’s consider the common scenario of using a Network Attached Storage (NAS) device as a backup target. This is a great idea since it allows backup to finish more quickly and to take place more frequently than most tape-based solutions would. Crucially, restores can be done far more quickly than from most tape systems.

Home NAS device

Many people would first look at the capacity and then look at the price: gigabytes of storage per pound spent seems a reasonable yardstick. This would make the Western Digital My Book Edition II 2TB NAS look like a fantastic bargain at £190 or so. When you set it up with RAID 1 (mirroring) the storage space drops to 1TB but that might still be enough to back up a small server. To use any disk system without some kind of RAID, mirroring as a minimum, would be crazy. In our experience, such cheap NAS boxes are best for home use, as in this picture, where they are only written to by one machine at a time and aren’t expected to work too hard.

Small Business NAS Device

Scaling things up a bit, we have used higher capacity and higher specification NAS devices as backup targets in environments where cost is a factor. Like the Buffalo Terastation III 6TB NAS shown here, they run a version of Linux, have software RAID 1 or 5, a Gigabit network card and are built to a businesslike standard. Cost is around £900. These work well in general. However when they are written to by multiple servers at the same time, the internal hardware starts to reach its limits, which can result in missed backups. Vendor support can be patchy and is seldom speedy.

Entry Level Corporate NAS

For multiple server environments ISN use a higher grade NAS as a backup target: basically a server running a version of Windows 2008 known as Storage Server. These rack mountable enterprise level NAS devices have hardware RAID controllers, can have multiple network interfaces and a range of other hardware options. Prices start at about £2200 for the HP X1400 2TB model shown here. Dell’s PowerVault NX300 NAS is around the same price. These use standard parts and an operating system which is easy to support worldwide. If you add an onsite warranty pack, you can have an engineer from HP (or Dell) on your doorstep to fix it within 6 hours if it breaks . So much better than trying to revive a cheaper NAS at the time when you need it most.

Value doesn’t come cheap

As in so many situations, you do get what you pay for with IT hardware, just like you do with cars, cameras, smartphones, whatever. The cost of a £3000 NAS depreciated over 3 years is a minimal cost to a business compared to several days of downtime if an inadequate backup system fails to restore your critical data.

This short article only covers one aspect of data backup for businesses. We sell all the items mentioned above and many more besides. Please speak to your ISN account manager or our sales department on 020 7313 8300 to discuss whether your backup solution is robust enough for your business needs.

Today several businesses and employees are waking up to a uncertain future in central London. On Friday a large scale fire broke out in Dean Street, Soho, gutting at least one business and leading to a large number of residents being evacuated for many hours.

Whether the fire could have been prevented remains unclear. Maybe the business involved has the ability to continue to trade; if not, they will have a number of difficult questions to answer about business continuity and disaster recovery.

If you have a disaster recovery plan, you hope never to use it. Putting one in place however, along with enabling technologies, would drastically reduce the downtime casued by an actual disaster, while improving the underlying infrastructure for day to day operations.

Impact analysis

ISN advise customers to regularly carry out business impact analysis of each business unit of their organisation. Understanding how a disaster would affect each business unit, in terms of hard and soft costs (lost orders and loss of future orders through brand degradation) is critical to developing a robust strategy to tackle any disaster. Getting your data to the right people quickly is a decisive point in allowing your business to continue.

Understanding that your data is not the only issue to deal with: new equipment, offices, and infrastructure may also be required. Implementing plans so that every member of your business understands how to continue with business as usual, in the event of a massive business outage is key.

Solutions

ISN recommends organisations look at technologies such as virtualisation, storage and offsite backups to help circumvent these situations. Mirrored storage would allow you to have you mission critical data to be centralised off your main site and allow for replication back to your head office when new equipment is installed. That, coupled with technologies such as Citrix XenApp to allow users to work from home as if they were in the office, means you lose fewer working days. If you are small enough not to need to shared storage, offsite back up can cut data restore times and get your business going again very quickly.

Next steps

ISN provides business impact analysis for organisation and provides disaster recovery planning services, in the form of a workshop. Our aim is to ensure that in the event of your business being involved in any disaster scenario, it quickly returns to business as usual instead of becoming business confusion.

This involves taking a snapshot image of a whole server (or desktop PC or laptop). If the server fails, the image can be used to recreate it the server on any hardware – doesn’t have to be identical - long as it has enough disk space and memory.

 What results will image backup give you? Read more »

An ISN client made the tough decision to make a few staff redundant because of the downturn. They have a tight procedure for handling logon account deactivation and return of security badge, etc. However one of the departing staff asked if his account could be reactivated from 5pm for half an hour so that he could finish off a key piece of documentation. His boss agreed to let him finish the work.

Data wiped out

The next day some of his former work mates found that about 15GB of file data had gone missing - 4,500 files. When the IT support team investigated, they saw from the logs on their NetApp Storage Area Network (SAN) system that a folder which was backed up at 5pm was no longer there at 6pm. On closer inspection, they were able to establish that the missing folders had been deleted at 5:20pm.

Snapshot restore

Their NetApp SAN is set up to take snapshots of all data at hourly intervals, so restoring to the 5pm copy meant that all of the deleted data was able to be restored completely. In addition, it took a mere 10 minutes from noticing that the data was gone to having it all back to normal.

Tape backup?

If our client had relied purely on tape backup then it would certainly have taken a lot longer; many companies only take a tape backup of their data once a day. This would mean that they would have lost a day’s work and it might have taken hours to get the previous might’s version restored.

Investigate better backup methods

The cost of storage is falling and the amount of data held by businesses is growing (some say the it doubles every two years). It is nearly always cheaper to add more space than to prune the data set down to size. However that can create other problems if the backup solution is not scaled up to match.

There are plenty of gotchas in IT. To avoid them, please call our consultants to get some practical advice. We are trained and experienced in providing infrastructure solutions which help businesses be productive, even when the unexpected happens.