Messages in this thread | | | Date | Tue, 02 Jan 2007 12:35:40 -0500 | From | Mark Lord <> | Subject | Re: 2.6.20-rc2+: CFQ halving disk throughput. |
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Tejun Heo wrote: > > OT but care to make -i and -I work equivalently? Such that -i reports > more detailed info and user can dump stored id block.
hdparm -I works just fine now.
hdparm -i requires the HDIO_GET_IDENTITY ioctl() from drivers/ide, to retrieve the "boot time" copy of the identify block, before any mods are made by the driver. But in recent years, drivers/ide has broken it, in that it tries to maintain the "boot time" copy in sync with the on-drive copy. Kinda makes -i pointless.
Is there a way to retrieve the libata cached copy of the ID block? How?
>Support for IDENTIFY PACKET DEVICE would be nice too.
It already does that, using HDIO_DRIVE_CMD to retrieve it in the same way as for regular IDENTIFY DEVICE commands.
In hdparm-7.0, I'll have it use ATA passthrough when possible for most/all commands.
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