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I have tried all of the ports with the same results but I will try the cable 
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I have tried all of the ports with the same results but I will try the cable

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the new cable worked <br />
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thanks 
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I have a server 2008 SBS I have been using 2 1TB external hard drives &nbsp;and I use Windows server back to do Full backups. I use two externals becuase I take one home with me every night and leave the other one to perform the backup. <br />
everthing was working great but a week ago the server stop seeing the &nbsp;drives. if I reboot it sees the one that its connect but if I remove the external and swap it stops seeing it. I dont see them in device manager or disk management. I have unistalled the USB hubs from device manager and scan for hardware changes with no sucess. since I only have one server and its works as exchange, file server, with 3 virtual servers I really cant reboot everyday. <br />
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any ideas?
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I have a server 2008 SBS I have been using 2 1TB external hard drives  and I use Windows server back to do Full backups. I use two externals becuase I take one home with me every night and leave the other one to perform the backup. 
everthing was working great but a week ago the server stop seeing the  drives. if I reboot it sees the one that its connect but if I remove the external and swap it stops seeing it. I dont see them in device manager or disk management. I have unistalled the USB hubs from device manager and scan for hardware changes with no sucess. since I only have one server and its works as exchange, file server, with 3 virtual servers I really cant reboot everyday. 

any ideas?

External hard drives not showing up in Server 2008 SBS.

Small Business Server (SBS) is a line of server operating systems targeted at small businesses by bundling the operating system with a number of other Microsoft products that would normally need to be purchased or licensed separately. The most notable inclusions are Exchange, SQL Server, SharePoint and ISA/TMG (Microsoft's firewall and proxy server).

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.

Windows Server 2008

Storage devices include any device used for storing and retrieving digital information. Hard disk drives (HDDs) use one or more rigid ("hard") rapidly rotating disks (platters) coated with magnetic material. Data is accessed in a random-access manner, meaning that individual blocks of data can be stored or retrieved in any order and not only sequentially. The primary competing technology for secondary storage is flash memory in the form of solid-state drives (SSDs), but HDDs remain the dominant medium for secondary storage due to advantages in price per bit and per-device recording capacity. CD-RW (Compact Disc-ReWritable) is a digital optical disc storage format that allows information to be stored outside the mechanical HDD.