[CentOS] Re: software raid
John R Pierce
pierce at hogranch.com
Fri Mar 30 23:14:46 UTC 2007
> It is the breaking of electrical connections that it trips on. Even if a drive
> fails, it is still commected, and the system can ignore it. AFAIR you can't
> hot swap a regular SCSI drive either.
you can hot swap a SCSI drive thats on a SCA (80 pin) connector as that
connector is specifically designed for it. IDEALLY, there's a scsi
backplane processor chip on the SCSI backplane, often SCSI device 15,
which notifies the host (or raid controller) of the drive changes, but
thats not absolutely neccessary.
SCA and SATA connectors intentionally have shorter signal and power, and
longer ground pins so when they are hotplugged the signals are sequenced
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