When enabling hash-depth directories the session file is created but cannot be read.

./configure --with-apxs=/usr/local/apache/bin/apxs --with-mysql=/usr --enable-track-vars --enable-magic-quotes --disable-debug --disable-libtool-lock --without-ndbm --disable-inline

[Session]
session.save_handler      = files   ; handler used to store/retrieve data
session.save_path         = 2:/sessions
session.use_cookies       = 1
session.name              = PHPSESSID
session.auto_start        = 0
session.cookie_lifetime   = 0
session.cookie_path       = /
session.cookie_domain     =  
session.serialize_handler = php
session.gc_probability    = 1
session.gc_maxlifetime    = 1440
session.referer_check     =  
session.entropy_length    = 0 
session.entropy_file      =   
session.cache_limiter     = nocache
session.cache_expire      = 180