The mergers come thick and fast. Now news that Seagate has bought Mirra, a consumer back-up drive, which has been a critical success in the “PC” market. The company recently introduced a $800-400 GB monster. Given that most of the hard drive makers are struggling to eke out a living, this doesn’t come as a surprise. Mirra was started by Tim Bucher, former Apple executive, who is having some issues with Jobs and his company. Everyone is searching for ways to “value add” to their product line, and thus goose-up the profits. Maxtor, for instance, came-up with a similar digital drive. I get a feeling, given Seagate’s retail presence, Mirra back-up drives will get more retail presence. No details on the price-tag! It must have been a big one — because Sequoia Capital pumped in $8 million into the Sunnyvale start-up. Update: According to Venturewire, the Mirra-Seagate deal was between $15 million nd $30 million.