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Cons: Drive was installed, recognized, & initialized. Format produced:
732533504 bad sectors were encountered during the format. These sectors
cannot be guaranteed to have bee cleaned.
Creating file system structures.
The first NTFS boot sector is unwriteable.
All NTFS boot sectors are unwriteable. Cannot continue.
Attempted to format drive twice produced the same results.
Pros: Fast performance.
Cons: I previously reviewed this card at the end of last year. This is a follow-up of the same card.
A sector became corrupt on one of the drives in a RAID 6 set. Any reliable hard drive controller, RAID or not, is supposed to identify bad sectors & adjust accordingly. Unfortunately, this card generated an informational log message but failed to mark the sector as bad & make the appropriate adjustments.
After identifying the problem after several days of unexplainable "quirks" with several applications, the failing hard drive & the Adaptec 6805 card were replaced & the entire system restored to prior to the corruption...causing a complete loss of data entered during that period.
After sending the card & logs into Adaptec technical support & escalating the issue, all they could say was "it shouldn't have done that". They confirmed that the card was fine & should have identified the bad sector & that the affected data should have been relocated & the sector marked as bad. They simply had no idea why the card did (or didn't do) what it did. The card was running the latest firmware & the latest driver was loaded.
Understandably, I will never use another Adaptec card. I simply can't trust them.
Pros: The RAID performance is solid.
Cons: 1) I bought this card for a server build that was to replace a Dell PowerEdge. After months of technical support involvement with Symantec (Backup Exec), Microsoft (Windows Server 2008 R2 x64), & Adaptec (this card/driver), a successful recovery to dissimilar hardware was not possible when this particular card was involved. The driver works perfectly once installed, but during the recovery process the driver fails to initially install successfully. You must inject the driver manually, & then you have to do so TWICE because the initial attempt always fails. This issue was escalated to the highest levels of Adaptec & Symantec technical support, & no successful solution could be identified. Although Adaptec did claim ownership of the problem, they were unable to provide a driver that worked or any solution to this issue. Identical server migrations using a comparable Intel RAID controller worked perfectly. I'm not sure if this issue is isolated to this particular model or if it is an Adaptec issue with all of their RAID controllers/drivers, as this is the only Adaptec model that I've attempted to use in this particular scenerio.
2) As previously mentioned by others, this thing runs HOT. Make sure that you have adequate cooling.
3) As also mentioned by others, don't expect to install SAS drives to this card with the included cables. You'll need a SAS sub-chassis that accepts SATA connectors or a similar solution.
Other Thoughts: While I generally prefer Adaptec products over Intel, in this case Adaptec's offering simply won't work. I still use this Adaptec RAID controller for new server builds, but it isn't a reasonable solution for a server that must be loaded via a recovery to dissimilar hardware due to its flawed driver. I can confirm, however, that once this driver is installed on the source server it will install perfectly on another server with dissimilar hardware that uses this card during such a recovery process.READ FULL REVIEW