- PROMISE PEGASUS R4 RED LIGHT UPGRADE
- PROMISE PEGASUS R4 RED LIGHT SOFTWARE
- PROMISE PEGASUS R4 RED LIGHT PC
We had no problem simulating a drive failure by popping a drive out while the Drobo was operating. It will incorporate the new drive into the storage pool, and you can continue to work, assured that your data is accessible with no down time. You simply pop the bad drive out, slide a new one in of the same or larger capacity, and then the Drobo will get to work in the background. If one of the drive mechanisms fails, it is marked by a blinking red light (rather than green, which indicates the drive is fine) next to its slot in the Drobo chassis. To put it simply: Although you can mix up to four drives of differing capacities, it will still be more efficient if the drives are close to the same capacity. The usable capacity drops from 1.8TB down to 232GB, because the Drobo is then protecting against the 250GB drive mechanism being the only drive available. Note that while adding an extra 1TB to a pair of 2TB drive mechanisms doesn't waste any space on the drives (going from 1.81TB of space up to 2.72TB after the Drobo sets them up), adding a disproportionately imbalanced drive like a 250GB drive to a single 4TB mechanism doesn't work to your benefit.
PROMISE PEGASUS R4 RED LIGHT UPGRADE
What this means is that if any of the four drives physically fail, then all 3.63TB will be safe, and you'll be able to continue access all the data until you replace or upgrade the failed drive. For example, our test unit had two 1TB and two 2TB drives installed for a potential capacity of 6TB, though the protected storage bucket is really 3.63TB with 1.82TB occupied for data protection. In contrast, Drobo lets you add any SATA drive of any capacity and speed to the mix. The issue with RAID arrays is that the drives need to be identical (mainly in capacity and speed) for RAID to work right. Those are the most common configurations for desktop PCs, though RAID configurations can get even more esoteric for servers.
PROMISE PEGASUS R4 RED LIGHT PC
A USB 3.0 port on the back provides connectivity to your Mac or PC (up from USB 2.0 in the first iteration), and the Drobo comes with an external power brick.įirst, a short primer on how RAID works: RAID arrays take identical drives and either pairs them together for maximum storage and speed (RAID 0), copies everything to both drives for data redundancy (RAID 0), or mixes the two and spreads data parity over several drives (RAID 5). Just grab a drive from its anti-static packaging, insert it right side up, and the Drobo will then automatically start up the drive and incorporate it into its storage set. It's notable because unlike the LaCie 2big Thunderbolt 2, LaCie 5big or the Promise Pegasus R4, you won't have to screw the drive mechanisms to sleds before installation. It's a minimally styled black metal box with four slots to accommodate bare, 3.5-inch, desktop-class, internal SATA I/II/III hard drives. The updated version of the Drobo looks very much like the first-generation Drobo we looked at in 2007. It's a good choice for large-capacity storage or backing up your computer, with an extra safety net you don't get with regular external hard drives. Put all three drives into the Drobo enclosure, and boom, you now have a 2.75TB volume (using 0.25TB for data integrity) on your PC or Mac that's fully protected even if one drive physically fails. Say you have one 1TB and two spare 2TB 3.5-inch internal hard drives sitting around. The Drobo Gen 3 ($349) four-bay storage system hard drive enclosure looks and acts like a RAID array, but its biggest benefit is that you don't have to place a set of identical drives in it.
PROMISE PEGASUS R4 RED LIGHT SOFTWARE
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